INC251 - Application for Extension of Filing Time/Prepayment of Individual Income Tax. INC251 - Application for Extension of Filing Time/Prepayment of Individual Income Tax 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering the tax year beginning and ending dates at the top of the form. If you have an account number, include it as well.
3. Indicate whether you are applying for an extension of filing time or making a prepayment by checking the appropriate box.
4. Fill in your total taxable income from dividends and interest on Line 1. For joint filers, enter half if only one spouse is blind or quadriplegic.
5. On Line 2, subtract the exemption amount ($2,500 for married filing jointly, $1,250 for others) from your total taxable income.
6. Calculate the amount subject to tax on Line 3 by subtracting Line 2 from Line 1.
7. Enter your extension payment or prepayment amount (1% of Line 3) on Line 4. Remember that a payment is not required for an extension but will accrue interest if unpaid.
8. Complete the signature section at the bottom, ensuring all necessary signatures are provided before submission.

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