Ohio residents with income greater than the federal standard deduction are required to file an Ohio income tax return, the IT-1040. The IT-1040 must be filed by April 15. If you cannot file by April 15 you need to file a tax extension, which extends the due date of your IT-1040 to October 15. Complete your federal individual income tax return prior to starting your Ohio return, as you'll need information from your federal return to complete your state return.
Fill out your IT-1040 by entering your personal information, including your name, Social Security number and address. If you are a joint filer, enter the same information for your spouse. Check the box with your appropriate residency status–part year, full-time or non-resident. Choose your filing status and enter your Ohio School District number.
Refer to your federal income tax return for your adjusted gross income and enter it on line 1. If you filled out Schedule A on page 3, enter the amount on line 2. Subtract line 2 from line 1 and enter the total on line 3. Multiply your exemptions by $1,700 and enter the amount on line 4. Subtract line 4 from line 3 and enter the total on line 5. This is your Ohio taxable income.
Calculate your Ohio state tax by using the IT-1040 instructions. Locate the tax table on pages 35 through 41. Use your total income and your filing status to find your tax. Enter the amount on line 6. Enter any credits from Schedule Bon page 4, if applicable, on line 7. Subtract line 7 from line 6 and enter the total on line 8. Multiply your personal exemptions by $20 and enter the total on line 9, then subtract the total from line 8 and enter the sum on line 10.
Enter the amount from line 10 on line 11. Enter your joint filing credit on line 12 and subtract the total from line 11. Enter the amount on line 13. Enter the amount from line 69 of your Schedule C, D, or E, if applicable, on line 14. Subtract this from line 13 and enter the total on line 15. If you owe interest on underpaid estimated taxes, enter on line 16. If you have unpaid Ohio use tax, enter the total on line 17. Add the amounts on lines 15, 16 and 17 and enter the total on line 18. This is your Ohio tax liability.
Report your Ohio tax withholding on line 19. Enter any estimated payments or overpayments applied to this year's tax from previous years on line 20. Add your tax credits to line 21. Add lines 19 through 21 and enter the total on line 22, which are your total payments. Compare the amounts on lines 18 and 22. If the amount on 22 is larger, move on to the information required on line 23. If the amount on line 18 is larger, skip to line 27.
Subtract the amount on line 18 from the amount on line 22 and enter the total on line 23, which represents the amount of tax you overpaid during the tax year. Enter any amount you'd like to credit to the next year's taxes on line 24 or leave it blank otherwise. On line 25, enter any donations you'd like made from your overpayment. On line 26, enter the amount of your overpayment you'd like refunded to you. If you do not owe any penalties and interest on line 28, enter the amount of your refund on line 30.
Subtract the amount on line 22 from line 18 if 18 is larger, and enter the amount on line 27. On lines 28 and 29 you'll need to use the IT-1040 instructions to figure out if you owe additional penalties and interest if you underpaid your taxes or if you are paying late. Enter the sum of lines 27 through 28 on line 29. You owe this amount to the Ohio Department of Taxation. Compose a check in the amount of your tax due and include it with your mailed tax return.
Sign and date your return. If you owe tax with your return, mail your return and check to:
Ohio Department of Taxation P.O. Box 2057 Columbus, OH 43270-2057
If you are due a refund, mail your return to:
Ohio Department of Taxation P.O. Box 2679 Columbus, OH 43270-2679