Follow the steps to successfully complete the form online.

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Begin with Part I: Schedule A - Itemized Deductions. If you chose to itemize instead of taking the standard deduction on your federal return, utilize Federal Form 1040 Schedule A to gather your information. Transfer your Federal adjusted gross income from line 11 of your Federal Form 1040 into line 1 of this schedule.
3. In line 2a, input your total medical and dental expenses. Line 2b requires you to calculate 7.5% of your Federal adjusted gross income; enter this amount. Line 2c should reflect the medical and dental expense deduction, which is the result of line 2a minus line 2b.
4. Proceed to line 3 to fill in total taxes paid in line 3a while excluding state income taxes or any other taxes in lieu in line 3b. Line 3c will then be your total taxes deduction, calculated as the difference between line 3a and line 3b.
5. Input your total interest paid in line 4, then enter your charitable contributions in line 5. If applicable, report your total casualty or theft loss in line 6, after attaching Federal Form 4684.
6. For miscellaneous deductions, input your amounts in line 7a and subtract any Mississippi gambling losses in line 7b. Calculate total other miscellaneous deductions for line 7c.
7. Calculate your Mississippi itemized deductions by adding lines 2c, 3c, 4, 5, 6, and 7c. Record this total in the designated space and on the appropriate line of the Resident Form 80-105 or Non-Resident Form 80-205.
8. Advance to Part II: Schedule B - Interest and Dividend Income. Report your interest income from all sources in line 1 and any Mississippi nontaxable interest in line 2. The total Mississippi interest will be recorded in line 3.
9. Continue by filling out line 4 with your total dividends and subtract any Mississippi nontaxable distributions in line 5 to derive total Mississippi dividends in line 6.
10. For Part III: Voluntary Contribution Check-Offs, choose any funds to donate part of your tax refund, entering the totals in the appropriate space.
11. If applicable, fill out sections for income (loss) from rents, partnerships, S corporations, trusts, and other income in Parts IV and V, making sure to attach any necessary forms.
12. Finally, review all provided information for accuracy, then save your changes, and proceed to download, print, or share the completed form as needed.

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