MO-1040A Single Married (Income from one spouse) short form - dor mo 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering your last name, first name, and middle initial in the designated fields. Ensure accuracy as this information is crucial for identification.
3. Fill in the Social Security numbers for both you and your spouse, if applicable. If either is deceased, mark that accordingly.
4. Provide your present address, including any apartment number or rural route details. This ensures proper correspondence from the Department of Revenue.
5. Check the appropriate boxes that apply to you or your spouse regarding age, disability status, and filing status. This will affect your deductions and tax calculations.
6. Input your federal adjusted gross income from your federal return on Line 1. Follow this by subtracting any state income tax refund included in that amount on Line 2.
7. Calculate your total Missouri adjusted gross income by subtracting Line 2 from Line 1 and enter it on Line 3.
8. Mark your filing status on Line 4 and enter the corresponding exemption amount based on your situation. This is essential for determining deductions.
9. Complete the remaining sections for deductions, tax calculations, and any amounts due or refunds expected. Review all entries carefully before submission.

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