Form 80-320-23-3-1-000 (Rev. 10/23)
    0606 0707 080 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38Mississippi39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
0404                                                                                            Individual Income Tax                                                                                                                            0404
0505                                                                                Interest and Penalty Worksheet                                                                                                                               0505
0606                                                                                                                                                                                                                                             0606
0707 Taxpayer First Name                                                Initial  Last Name                                                                         SSN                                                                           0707
                                                                                                                                                                                                                   999999999
0808XXXXXXXXXXXXXXXXXXXXX X XXXXXXXXXXXXXXXXXXXXX                                                                                                                                                                                                0808
0909 Spouse First Name                                                  Initial  Last Name                                                                         Spouse SSN                                                                    0909
                                                                                                                                                                                                                   999999999
1010XXXXXXXXXXXXXXXXXXXXX X XXXXXXXXXXXXXXXXXXXXX                                                                                                                                                                                                1010
1111 Mailing Address (Number and Street, Including Rural Route)                                                                                                             Farmers or Fishermen (see instructions)                              1111
                                                                                                                                                                   X
1212X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X                                                                                                                                                                                                1212
1313 City                                                                  State    Zip                                       County Code                                   Filing Requirements Met After Due Date                               1313
                                                                                                                                                                   X        (see instructions)
1414XXXXXXXXXXXXXXXXXXXXX XX                                                                    99999                               99                                                                                                           1414
1515 INTEREST ON UNDERPAYMENT OF ESTIMATED TAX                                                                                                                                                                                                   1515
1616                                                                                                                                                                              CALCULATION OF ESTIMATE PAYMENT 1616
17171    2023 Mississippi income tax liability (see instructions)                                                                                                                 1                             9999999999                       1717
18182    Multiply the amount on line 1 by 80% and enter the result                                                                                                                2                             9999999999                       1818
19193    2022 Mississippi income tax liability (see instructions)                                                                                                                 3                             9999999999                       1919
20204    Enter the lesser of line 2 or line 3 (see instructions)                                                                                                                  4                             9999999999                       2020
2121                                                                                                                                                                                                                                             2121
2222                                                                                                                          A                                       B                             C                             D              2222
                                    INTEREST CALCULATION
2323                                                                                                                    Apr. 15, 2023                        June 15, 2023                 Sept. 15, 2023                   Jan. 15, 2024        2323
24245    Required installments  Enter 1/4th (.25) of line 4                                                                                                                                                                                      2424
2525                                                                                                              9999999999                              9999999999                    9999999999                    9999999999                 2525
26266    Income tax withheld (column A only) and estimated tax paid                                                                                                                                                                              2626
          (enter total estimated tax paid as of payment due dates) 
2727                                                                                                              9999999999999999999999999999999999999999                                                                                       2727
28287    Overpayment (negative) or underpayment (positive) - carryforward                                                                                                                                                                        2828
          (from line 8) from previous column(s) line 8.
2929                                                                                                                                                      9999999999                    9999999999                    9999999999                 2929
30308    Underestimate subject to interest (line 5 minus line 6 plus line 7);                                                                                                                                                                    3030
3131      enter result here and on line 7, columns B through D.                                                                                                                                                                                  3131
                                                                                                                  9999999999999999999999999999999999999999
32329    Enter percentage of interest (compute interest at 1/2% per month)                                                                                                                                                                       3232
3333                                                                                                                    999.9999                                999.9999                      999.9999                      999.9999             3333
343410  Interest due (multiply line 8 by line 9; if line 8 is negative, enter                                                                                                                                                                    3434
          zero)
3535                                                                                                              9999999999999999999999999999999999999999                                                                                       3535
3636                                                                                                                                                                                                                                             3636
373711  Total underestimate interest due                        (enter the total of line 10, columns A through D)                                                                 11                            9999999999                       3737
3838                                                                                                                                                                                                                                             3838
3939                                                                                                                                                                                                                                             3939
4040 FIRST-TIME HOME BUYER PENALTY                                                                                                                                                                                                               4040
4141                                                                                                                                                                                                                                             4141
424212  First-time Home Buyer Penalty (see instructions)                                                                                                                          12                            9999999999                       4242
4343                                                                                                                                                                                                                                             4343
4444 LATE FILING PENALTY                                                                                                                                                                                                                         4444
4545                                                                                                                                                                                                                                             4545
464613  Balance due (from Form 80-105 (Resident), page 1, line 35 or from Form 80-205                                                                                             13                            9999999999                       4646
4747      (Non-Resident/Part-Year), page 1, line 36)                                                                                                                                                                                             4747
484814  Late filing penalty (5% per month not to exceed 25% on amount of tax due, line 13,                                                                                        14                            9999999999                       4848
          minimum $100; see instructions)
4949                                                                                                                                                                                                                                             4949
5050 LATE PAYMENT INTEREST AND PENALTY                                                                                                                                                                                                           5050
5151                                                                                                                                                                                                                                             5151
525215  Balance due (from Form 80-105 (Resident), page 1, line 35 or from Form 80-205 (Non-Resident/                                                                              15                            9999999999                       5252
5353      Part-Year), page 1, line 36)                                                                                                                                                                                                           5353
545416  Late payment interest (compute interest at 1/2% per month on the amount of tax due,                                                                                       16                            9999999999                       5454
5555      line 15; see instructions)                                                                                                                                                                                                             5555
565617  Late payment penalty (compute penalty at 1/2% per month not to exceed 25% on the amount                                                                                   17                            9999999999                       5656
5757      of tax due, line 15; see instructions)                                                                                                                                                                                                 5757
585818  Total late payment interest and penalty (line 16 plus line 17)                                                                                                            18                            9999999999                       5858
5959                                                                                                                                                                                                                                             5959
6060 TOTAL INTEREST AND PENALTY                                                                                                                                                                                                                  6060
6161                                                                                                                                                                                                                                             6161
626219  Total interest and penalty                    (line 11, plus line 12, plus line 14 and line 18) Enter here and on                                                         19                            9999999999                       6262
6363       Form 80-105, line 36 or Form 80-205, line 37.                                                                                                                                                                                         6363
    0606 0707 080 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

    Form 80-320-23-3-2-000 (Rev. 10/23)
    0606 0707 080 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38Mississippi39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
0404                                                                                                                                                                                                                                                                                         0404
                                                                                                                          Individual Income Tax
0505                                                                                                                                                                                                                                                                                         0505
                                                                                         Interest and Penalty Worksheet Instructions
0606                                                                                                                                                                                                                                                                                         0606
0707                                                                                                                                                                                                                                                                                         0707
0808Use Form 80-320 if your 2023 Mississippi income tax liability exceeds $200 to calculate interest on underpayment of estimated tax.  This0808
0909form is also used to calculate first-time home buyer penalty, late payment interest and penalty, and the late filing penalty for the Resident0909
1010Individual Income Tax Return (Form 80-105) and the Non-Resident/Part-Year Resident Return (Form 80-205).                                                                                                                                                                                 1010
1111                                                                                                                                                                                                                                                                                         1111
1212Specific Line Instructions                                                                                                                                                                                                                                                               1212
1313                                                                                                                                                                                                                                                                                         1313
1414Exceptions                                                                                                                                                                                                                                                                               1414
1515                                                                                                                                                                                                                                                                                         1515
1616 X                  Gross income from farming or fishing is at least two-thirds of total gross income and (a) estimate tax paid by the 15th day of                                                                                                                                       1616
1717                    the first month after the close of the income year or (b) income tax return is filed by the first day of the third month following                                                                                                                                   1717
1818                    the close of the income year and tax shown due is paid.                                                                                                                                                                                                              1818
1919                                                                                                                                                                                                                                                                                         1919
2020 X                  Filing requirements met after payment due date - compute interest in applicable columns and provide an explanation below.                                                                                                                                            2020
2121                 X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9XX9X9X9X9X9X9X9X9X9X9X9X9X2121
2222                 X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9XX9X9X9X9X9X9X9X9X9X9X9X9X2222
2323                 X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9XX9X9X9X9X9X9X9X9X9X9X9X9X2323
2424                 X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9X9XX9X9X9X9X9X9X9X9X9X9X9X9X2424
2525                                                                                                                                                                                                                                                                                         2525
2626 Underestimate                                                                                                                                                                                                                                                                           2626
2727                                                                                                                                                                                                                                                                                         2727
2828 Line 1          Enter your 2023 Mississippi net income tax liability from Form 80-105, line 20, (Resident) and Form 80-205, line 22                                                                                                                                                     2828
2929                 (Non-Resident/Part Year).  If your 2023 Mississippi Income Tax Liability is $200 or less, do not complete the remainder of this                                                                                                                                         2929
3030                 form; no interest is due on underestimate of tax.                                                                                                                                                                                                                       3030
3131                                                                                                                                                                                                                                                                                         3131
3232 Line 3          Enter your 2022 Mississippi net income tax liability from Form 80-105, line 21, (Resident) and  Form 80-205, line 23                                                                                                                                                    3232
3333                 (Non-Resident/Part-Year).                                                                                                                                                                                                                                               3333
3434                                                                                                                                                                                                                                                                                         3434
3535 Line 4          Enter the lesser of line 2 or line 3.  If line 3 is zero and your 2023 Mississippi income tax liability (line 2) exceeds $200                                                                                                                                           3535
3636                 and no estimate payments for the 2023 tax year were made, enter the amount from line 2.                                                                                                                                                                                 3636
3737                                                                                                                                                                                                                                                                                         3737
3838First-time Home Buyer Penalty                                                                                                                                                                                                                                                            3838
3939                                                                                                                                                                                                                                                                                         3939
4040 Line 12         Enter the first-time home buyer penalty due. Add penalty of 10% for withdrawal of any unqualified expenses, using the                                                                                                                                                   4040
4141                 amount from Form 80-108, Part V, Schedule N, Line 2. (See Form 80-100, Instruction Booklet for more details).                                                                                                                                                           4141
4242                                                                                                                                                                                                                                                                                         4242
4343Late Filing Penalty                                                                                                                                                                                                                                                                      4343
4444                                                                                                                                                                                                                                                                                         4444
4545 Line 14 Enter late filing penalty due.  Add penalty of 5% per month, not to exceed 25% in the aggregate, from the extension                                                                                                                                                             4545
4646                    due date of the return, October 15th, on the amount of net tax due from Form 80-105, line 35 (Resident) and Form 80-205,                                                                                                                                             4646
4747                    line 36 (Non-Resident/Part-Year).  The penalty shall not be less than $100.                                                                                                                                                                                          4747
4848                                                                                                                                                                                                                                                                                         4848
4949 Late Payment Interest and Penalty                                                                                                                                                                                                                                                       4949
5050                                                                                                                                                                                                                                                                                         5050
5151 Line 15         Enter balance due.  From Form 80-105, line 35 (Resident) and Form 80-205, line 36 (Non-resident/Part-Year).                                                                                                                                                             5151
5252                                                                                                                                                                                                                                                                                         5252
5353 Line 16 Enter late payment interest due.  Add interest of 1/2% per month from the original due date of the return, April 15th,                                                                                                                                                          5353
5454                    on the amount of tax due from line 15.                                                                                                                                                                                                                               5454
5555                                                                                                                                                                                                                                                                                         5555
5656 Line 17   Enter late payment penalty due.  Add penalty of 1/2% per month, not to exceed 25% in the aggregate, from the original due                                                                                                                                                     5656
5757                    date of the return, April 15th, on the amount of tax due from line 15.                                                                                                                                                                                               5757
5858                                                                                                                                                                                                                                                                                         5858
5959 Line 18         Enter the total late payment interest and penalty by adding line 16 and line 17.                                                                                                                                                                                        5959
6060                                                                                                                                                                                                                                                                                         6060
6161 Total Interest and Penalty                                                                                                                                                                                                                                                              6161
6262                                                                                                                                                                                                                                                                                         6262
6363 Line 19         Enter the total interest and penalty by adding line 11, plus line 12, plus line 14 and line 18. Enter here and on Form 80-105,                                                                                                                                          6363
    0606 0707 008 09 10line11 12 133614(Resident)15 16 17 18 19 20 21and22 23Form24 25 2680-205,27 28 29 30 31line32 333734 35(Non-Resident/Part-Year).  36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

    Form 80-320-23-3-3-000 (Rev. 10/23)
    0606 0707 08009 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
0404                                                                                                    Mississippi                                                                                                                   0404
0505                                                                                           Individual Income Tax                                                                                                                  0505
0606                                                                      Underestimate Computation Example                                                                                                                           0606
0707                                                                                                                                                                                                                                  0707
0808                                                                                                                                                                                                                                  0808
0909 Line 5         Required installments.  Enter 1/4th (.25) of line 4 in each columns A through D.  Divide the amount on Line 4 by (4) four and                                                                                     0909
1010                enter in each column A through D.                                                                                                                                                                                 1010
1111                                                                                                                                                                                                                                  1111
1212Line 6          Income tax withheld (column A only) and estimated tax paid.  For column (A)only, enter the totaloverpayment from prior1212 
1313                year, estimated tax paid and/or withholding as of payment due date.  In remaining columns B through D enter estimated                                                                                             1313
1414                tax paid as of payment due dates on line 6.  If line 6 is equal to or more than line 4 for all payment periods, stop here; you do                                                                                 1414
                    not owe the penalty.
1515                                                                                                                                                                                                                                  1515
1616 Line 7  Overpayment (negative) or underpayment (positive) - carryforward (from line 8) any overpayment or underpayment from                                                                                                      1616
1717                previous column(s) line 8.                                                                                                                                                                                        1717
1818                                                                                                                                                                                                                                  1818
1919 Line 8  Underestimate subject to interest (line 5 minus line 6 plus line 7); enter result here and on line 7, columns B through D.                                                                                               1919
2020                                                                                                                                                                                                                                  2020
2121 Line 9         Enter percentage of interest (compute interest at 1/2% per month from payment due date until paid or next payment due                                                                                             2121
2222                date, whichever is earlier).                                                                                                                                                                                      2222
2323                                                                                                                                                                                                                                  2323
2424 Line 10  Interest due (multiply line 9 by line 10);                                 if line 8 is negative enter zero on line 10.                                                                                                 2424
2525                                                                                                                                                                                                                                  2525
2626 Line 11  Total underestimate interest due (enter the total of line 10, columns A through D); If an overpayment is due, enter here and on                                                                                         2626
2727                Form 80-105, line 30 and Form 80-205, line 32.                                                                                                                                                                    2727
2828                                                                                                                                                                                                                                  2828
2929 Example:                                                                                                                                                                                                                         2929
3030                                                                                                                                                                                                                                  3030
3131 INTEREST ON UNDERPAYMENT OF ESTIMATED TAX                                                                                                                                                                                        3131
3232                                                                                                                                                                   CALCULATION OF ESTIMATE PAYMENT 3232
33331    2023 Mississippi income tax liability (see instructions)                                                                                                      1                                               6520           3333
34342    Multiply the amount on line 1 by 80% and enter the result                                                                                                     2                                               5216           3434
35353    2022 Mississippi income tax liability (see instructions)                                                                                                      3                                               4510           3535
36364    Enter the lesser of line 2 or line 3 (see instructions)                                                                                                       4                                               4510           3636
3737                                                                                                                                                                                                                                  3737
3838                                                                                                                         A                             B                             C                             D              3838
                                   INTEREST CALCULATION
3939                                                                                                                   Apr-15-2023                   Jun-15-2023                   Sept-15-2023                  Jan-15-2024          3939
40405    Required installements  Enter 1/4th (.25) of line 4 in columns A                                                                                                                                                             4040
4141      through D)                                                                                                      1127.50                       1127.50                       1127.50                       1127.50           4141
42426    Income tax withheld (column A only) and estimated tax paid                                                                                                                                                                   4242
4343      (enter total estimated tax paid as of payment due dates in columns                                                                                                                                                          4343
4444      A through D).                                                                                                   1500.00                       1000.00                          500.00                              0.00     4444
45457    Overpayment (negative) or underpayment (positive) - carryforward                                                                                                                                                             4545
4646      (from line 8) any overpayment or underpayment from previous                                                                                                                                                                 4646
          column(s) line 8.
4747                                                                                                                                                 (372.50)                      (245.00)                            382.50         4747
48488    Underestimate subject to interest (line 5 minus line 6 plus line 7);                                                                                                                                                         4848
4949      enter result here and on line 7, columns B through D.                                                        (372.50)                      (245.00)                            382.50                     1510.00           4949
50509    Enter percentage of interest (compute interest at 1/2% per                                                                                                                                                                   5050
5151      month from payment due date until paid or next payment due                                                                                                                                                                  5151
          date, whichever is earlier)
5252                                                                                                                            0.010                         0.015                         0.020                         0.015       5252
535310   Interest due (multiply line 8 by line 9; if line 8 is negative, enter                                                                                                                                                        5353
5454       zero)                                                                                                                   0.00                          0.00                        7.65                         22.65       5454
5555                                                                                                                                                                                                                                  5555
565611  Total underestimate interest due                       (enter the total of line 10, columns A through D)                                                       11                                                 30.30       5656
5757                                                                                                                                                                                                                                  5757
5858                                                                                                                                                                                                                                  5858
5959                                                                                                                                                                                                                                  5959
6060                                                                                                                                                                                                                                  6060
6161                                                                                                                                                                                                                                  6161
6262                                                                                                                                                                                                                                  6262
6363                                                                                                                                                                                                                                  6363
    0606 0707 08009 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 808 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80