Line-by-Line Instructions Free File Fillable Forms - IRS 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin with Part I: Schedule A. Enter your Federal adjusted gross income from Federal Form 1040, line 11 in the first field.
3. For medical and dental expenses, input the total in line 2a. Calculate 7.5% of your adjusted gross income and enter that amount in line 2b. Subtract line 2b from line 2a to get your deduction for medical expenses on line 2c.
4. Continue filling out lines for total taxes paid, interest paid, charitable contributions, and any casualty losses as applicable.
5. Move to Part II: Schedule B. Input your interest income from all sources in line 1 and calculate Mississippi nontaxable interest for line 2.
6. Complete the voluntary contribution check-offs in Part III by selecting funds you wish to contribute to, ensuring at least a $1 contribution.
7. Finally, review all entries for accuracy before saving or submitting your completed form.

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