The IRS thinks you may owe Alternative Minimum Tax (AMT).

Why you received IRS Letter 2194

1. You filed a tax return but did not include Form 6251, Alternative Minimum Tax – Individuals.
2. When the IRS processed the return, they determined that you are required to pay the AMT.
3. The IRS sent Letter 2194 to notify you of the proposed taxes due.

Notice deadline: 30 days

If you miss the deadline: You will lose the opportunity to dispute the proposed changes with the IRS Office of Appeals. The IRS will send you a Statutory Notice of Deficiency that gives you 90 days to appeal the changes in the U.S. Tax Court.