Oklahoma Income Tax Forms By Tax Year. e-File Your Taxes. 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering your Social Security Number and name as shown on your return at the top of the form.
3. In Section 1, list qualifying Oklahoma capital gains and losses. For each property sold, provide a description, Oklahoma location/address or Federal ID number, acquisition date, sale date, proceeds, cost basis, and adjustments.
4. Continue filling out lines 2 through 5 with details about installment sales and business property sales. Ensure you attach any required federal forms like Form 6252 or Form 4797.
5. Complete lines 6 through 10 by calculating total gains and losses. Follow the instructions carefully to ensure accuracy in reporting your net capital gain.

Start using our platform today to easily fill out your Oklahoma Income Tax Forms for free!