Missouri Department of Revenue Form Instructions
MO-A — Individual Income Tax Adjustments
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Form
(MM/DD/YY)
2025 Individual Income Tax Adjustments
Attach to Form MO-1040. Attach your federal return. See information beginning on page 12 to assist you in completing this form.
Spouse's Social Security Number
Social Security Number
- -
M.I.
First Name Last Name
Name
M.I.
- -
Suffix
Spouse's Last Name
Spouse's First Name
Additions
Suffix
Yourself (Y)
- Interest on state and local obligations other than Missouri source . . .
1Y
Spouse (S) . . 1S
Business Interest
- Partnership Fiduciary S Corporation
Net Operating Loss (Carryback/Carryforward)
Other (description)
2Y
25340010001 . . 2S
- Nonqualified distribution received from a qualified 529 plan not used for Part 1 - Missouri Modifications to Federal Adjusted Gross Income qualified expenses …
- Food Pantry contributions included on Federal Schedule A …
- Nonresident Property Tax …
- Nonqualified distribution received from a qualified Achieving a Better Life Experience Program (ABLE) not used for qualified expenses . . . .
- Total Additions - Add Lines 1 through 6. Enter here and on Form MO-1040, Line 2 …
Subtractions
- Interest from exempt federal obligations included in federal adjusted gross income - Attach a detailed list or all Federal Form(s) 1099 . . . . .
- Any state income tax refund included in federal adjusted gross income.
- Military Retirement Benefits (see instructions on page 14) … 3Y 4Y 5Y 6Y 7Y 8Y 9Y 10Y . . 3S . . 4S . . 5S . . 6S . . 7S . . 8S . . 9S . . 10S Railroad Retirement Benefits
- Partnership Fiduciary S Corporation Military (nonresident) Build America and Recovery Zone Bond Interest Combat Pay Net Operating Loss Business Interest Other (description)
- Exempt contributions made to a qualified 529 plan …
- Qualified Health Insurance Premiums - Attach the Qualified Health Insurance Premiums Worksheet (Form 5695) and supporting documentation … 11Y 12Y 13Y MO Public-Private Transportation Act . . 11S . . 12S . . 13S MO-A Page 1 For Privacy Notice, see instructions.
- Missouri depreciation adjustment (Section 143.121, RSMo.) 14Y Sold or disposed property previously taken as addition modification
- Exempt contributions made to a qualified Achieving a Better Life
15Y
Part 1 Continued Experience Program (ABLE) …
16Y
- Agriculture Disaster Relief …
- Business Income Deduction - see worksheet on page 16 of MO-1040
17Y
Instructions …
18Y
- Capital Gain …
- Total Subtractions - Add Lines 8 through 18. Enter here and on 19Y Form MO-1040, Line 4 … . .
14S . .
15S . .
16S . .
17S . .
18S . .
19S
Complete this section only if you itemize deductions on your federal return. Attach your Federal Form 1040 (pages 1 and 2) and Federal Schedule A. .
1 00
- Total federal itemized deductions from Federal Form 1040 or Federal Form 1040-SR, Line 12e … .
2 00
- 2025 Social security tax - (Yourself) … .
3 00
- 2025 Social security tax - (Spouse) … .
4 00
- 2025 Railroad retirement tax - Tier I and Tier II (Yourself) … .
5 00
- 2025 Railroad retirement tax - Tier I and Tier II (Spouse) … Part 2 - Missouri Itemized Deductions .
6 00
- 2025 Medicare tax - Yourself and Spouse (see page 16 of MO-1040 Instructions) … .
7 00
- 2025 Self-employment tax (see page 16 of MO-1040 Instructions) … .
8 00
- Total - Add Lines 1 through 7 …
- State and local income taxes from Federal Schedule A, Line 5a or enter . . $0 if completing worksheet below …
- Earnings taxes included in Line 9 … . 00 . 00 .
11 00
- Net state income taxes - Subtract Line 10 from Line 9 or enter Line 7 from worksheet below … .

Text version of this table
Complete this worksheet only if your total state and local taxes included in your federal itemized deductions exceeded $40,000 ($20,000 11 if married filing separately) or you were required to complete a federal worksheet to calculate Federal Schedule A, Line 5e. Part 2 Worksheet - Net State Income Taxes, Line 1. Enter the sum of your state and local taxes on Federal Form 1040 or Federal Form 1040-SR, . Schedule A, Line 5d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 00 2. State and local income taxes from Federal Form 1040 or Federal Form 1040-SR, Schedule A, Line 5a. . . . . . . . 2 . 00 3. Earnings taxes included on Federal Form 1040 or Federal Form 1040-SR, Schedule A, Line 5a. . . . . . . . . 3 . 00 4. Subtract Line 3 from Line 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 . 00 5. Divide Line 4 by Line 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 % 6. Enter the amount from Federal Schedule A, Line 5e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . 00 7. Multiply Line 6 by percentage on Line 5. Enter here and on net state income taxes, Line 11, above . . . . . . 7 . 00 00
25340020001 . 00
MO-A Page 2
Part 3 - Pension and Social Security/Social Security Disability (Instructions for Part 3 begin on page 17)
Public Pension Calculation - Pensions received from any federal, state, or local government.
- Taxable pension for each spouse from public sources from Federal
1Y
Form 1040 or Federal Form 1040-SR, Line 5b …
# Part 3 - Section A
- Amount from Line 1 or $47,633 (maximum social security benefit), 2Y whichever is less …
- If you received taxable social security, complete Form MO-A, Part 3, Section C, Lines 1 - 3, and enter the amount(s) from Line(s) 3Y 3Y and 3S … 4Y
- Subtract Line 3 from Line 2. If Line 3 is greater than Line 2, enter $0 . . .
1S . .
2S . .
3S . .
4S
- Total public pension. Add amounts on Lines 4Y and 4S … . 00
Private Pension Calculation - Annuities, pensions, IRAs, and 401(k) plans funded by a private source.
- Missouri adjusted gross income from Form MO-1040, Line 6 … .
1 00
- Taxable social security benefits from Federal Form 1040 or Federal Form 1040-SR, Line 6b … .
2 00
- Subtract Line 2 from Line 1 …
- Select the appropriate filing status and enter the amount on Line 4.
# Part 3 - Section B
- Married Filing Combined (joint federal) - $32,000
- Single, Head of Household, and Qualifying Widow(er) - $25,000 .
3 00
- Married Filing Separate - $16,000 … .
4 00
- Subtract Line 4 from Line 3. If Line 4 is greater than Line 3, enter $0 …
- Taxable pension for each spouse from private sources from Federal Form 1040 or Federal Form 1040-SR, Line 4b and 5b . . . . . 6Y
- Amounts from Line 6Y and 6S or $6,000, whichever is less … 7Y .
5 00 . .
6S . .
7S
- Add Lines 7Y and 7S … .
8 00
- Total private pension, subtract Line 5 from Line 8. If Line 5 is greater than Line 8, enter $0 … .
9 00
Social Security or Social Security Disability Calculation - To be eligible for social security deduction you must be 62 years of age by
December 31 and have selected the 62 and older box on page 1 of Form MO-1040. Age limit does not apply to social security disability deduction.
- Taxable social security benefits for each spouse from
# Part 3 - Section C
1Y
Federal Form1040 or Federal Form 1040-SR, Line 6b …
- Taxable social security disability benefits for each spouse from
2Y
Federal Form 1040 or 1040-SR, Line 6b …
3Y
- Amount from Line(s) 1Y or 2Y, and 1S or 2S … . .
1S . .
2S . .
3S .
4 00
- Total social security/social security disability. Add Lines 3Y and 3S …
Total Pension and Social Security/Social Security Disability
# Part 3 - Section D
Add Line 5 (Section A), Line 9 (Section B), and Line 4 (Section C) from Form MO-A.
. 00
Enter total amount here and on Form MO-1040, Line 8 …
Ever served on active duty in the United States Armed Forces?
If yes, visit dor.mo.gov/military/ to see the services and benefits DOR offers to all eligible military individuals, or complete the survey at mvc.dps.mo.gov/MoVeteransInformation/Survey/DOR to receive information from the Missouri Veterans Commission. A list of all state agency resources and benefits can be found at veteranbenefits.mo.gov/state-benefits/. 3 MO-A Page 3 25340030001
Source: view the official PDF
Nearby sections (21 sections)
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- mo-1040es · MO-1040ES — Declaration of Estimated Tax for Individuals
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- mo-941 · MO-941 — Employer's Return of Income Taxes Withheld
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