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Click ‘Get Form’ to open the 6251 form in the editor.
Begin by entering your social security number and the name(s) as shown on your Form 1040, 1040-SR, or 1040-NR at the top of the form.
In Part I, calculate your Alternative Minimum Taxable Income. Start with line 1 by entering the amount from Form 1040 or 1040-SR, line 15 if it's greater than zero.
Continue filling out lines for taxes from Schedule A or other relevant amounts as instructed. Ensure you follow each line's specific instructions for accurate reporting.
Once you complete Part I, move to Part II to determine your Alternative Minimum Tax (AMT). Follow the guidelines based on your filing status and enter the necessary calculations.
Finally, review all entries for accuracy before saving or exporting your completed form directly from our platform.

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What is form 6251 for?

Use Form 6251 to figure the amount, if any, of your alternative minimum tax (AMT). The AMT applies to taxpayers who have certain types of income that receive favorable treatment, or who qualify for certain deductions, under the tax law.

What records do I need for form 6251?

Filing Form 6251 involves several steps: Gather necessary documents: This includes your W-2, 1099s, Form 3921, and information about any ISOs exercisedplus any other documents needed for filing your regular taxes since youll need to calculate your regular tax to determine if you owe AMT.

Who qualifies for Alternative Minimum Tax?

Taxpayers who have incomes that exceed the AMT exemption of $88,100 (single), $137,000 (married filing jointly) and $68,500 (married filing separately) in 2025 may be subject to the alternative minimum tax when they file their 2026 tax return. AMT tax rates are 26% or 28%.

How do I find my form 6251?

To access Form 6251: From within your TaxAct return, click Federal. Click Taxes, then select Alternative minimum tax. Continue with the interview process to enter your information. The information is carried to Schedule 2 (Form 1040) Additional Taxes Line 1 and added to regular tax.