Missouri Form MO-1040A

Sep 19, 2026

Upload by Mabel

Missouri state income tax form MO-1040A instructions and worksheet content for calculating federal-based income, Missouri adjusted gross income, deductions, taxable income, and state tax. It includes a federal tax percentage chart tied to Missouri AGI ranges, guidance for attaching W-2 and 1099 forms, estimating 2024 payments, and handling refunds or amounts due. It also covers donations to Missouri trust funds, including optional allocations and related fund codes.

LanguageEnglish

CategoryForms

FormatPDF

Pages4

Reading Time2 min

AccessFree to download

Income

Refund

Amount Due

Reset Form Print Form Print in BLACK ink only and DO NOT STAPLE. For Privacy Notice, see Instructions. Federal Extension-Select this box if you have an approved federal extension. Attach a copy Federal Extension (Form 4868) . Department of Social Services Application of Eligibility form attached. Vendor Code 0 0 1 Select the appropriate boxes that apply. Claimed as a Dependent Married Filing Combined Married Filing Separately Head of Household Age 65 or Older 100% Disabled You may contribute to any one or all of the trust funds on Line 16. See instructions for more trust fund information. |
Medal of Honor
Fund |
Children’s Trust Fund |
Veterans Trust Fund |
Elderly Home Delivered Meals Trust Fund |
Missouri National Guard Trust Fund |
Workers
Workers’Memorial Fund |
Childhood Lead Testing Fund |
Missouri Military
Family Relief
Fund |
General Revenue
General Revenue Fund |
Organ Donor Program Fund | | Kansas City
Regional Law |
Soldiers
Memorial
Military Museum
in St. Louis Fund | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | Enforcement Memorial Foundation Fund | | | *24334010001* 24334010001 Income Refund Tax Deductions 1. Federal adjusted gross income from federal return (see page 6 of the instructions) .................. 1 . 00 2. Any state income tax refund included in federal adjusted gross income . . . . . . . . . . . . . . . . . . . . 2 . 00 3. Total Missouri adjusted gross income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 . 00 4a. Tax from federal return. Do not enter federal income tax withheld. | 4a | | | --- | --- | . 00 | 4b | | | --- | --- | 4b. Federal tax percentage – Enter the percentage based on your Missouri Adjusted Gross Income, Line 3. Use the chart below to find your percentage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . % Missouri Adjusted Gross Income Range, Line 3: Federal Tax Percentage: $25,000 or less ........................................................................ 35% $25,001 to $50,000 .................................................................. 25% $50,001 to $100,000 ................................................................ 15% $100,001 to $125,000 ............................................................... 5% $125,001 or more ..................................................................... 0% 4c. Federal income tax deduction – Multiply Line 4a by the percentage on Line 4b. Enter this amount not to exceed $5,000 for an individual or $10,000 for combined filers 5. Missouri standard deduction or itemized deductions. • Single or Married Filing Separate- $14,600 • Head of Household- $21,900 • Married Filing Combined or Qualifying Widow(er) - $29,200 If age 65 or older, blind, or claimed as a dependent, see federal return or page 6. If itemizing, see page 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4c . 00 5 . 00 6. Additional Exemption for Head of Household and Qualifying Widow(er) . . . . . . . . . . . . . . . . . . . . 7. Long-term care insurance deduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8. Total Deductions-Add Lines 4c through 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. Missouri Taxable Income-Subtract Line 8 from Line 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10. Tax-Use the tax chart on page 10 to figure the tax 11. Missouri tax withheld from Form(s) W-2 and 1099. Attach copies of Form(s) W-2 and 1099 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12. Missouri est

FAQs

How is Missouri adjusted gross income determined on Form MO-1040A?

Enter the federal adjusted gross income from the federal return (Line 1), plus any state income tax refund included in that federal amount (Line 2), then calculate Line 3 as the total Missouri adjusted gross income.

What is the federal tax percentage used for on this form?

Line 4b provides a percentage based on your Missouri adjusted gross income (Line 3). Line 4c is calculated by multiplying Line 4a by the Line 4b percentage, with limits stated for individuals and combined filers.

How are trust fund donations and refunds handled?

Line 16 allows donation allocations to specified trust fund boxes using trust fund codes, and the total donations are combined with other items. Refund is continued on the “Refund (continued)” section and amount due is determined when payments are less than the tax (Lines 13 vs. 10).

Sep 19, 2026

Upload by Mabel