Federal Form 8801 Credit for Prior Year Minimum Tax - Individuals, Estates, and Trusts is for the calculation of a credit in certain circumstances when one has had the Alternative Minimum Tax (AMT) in a prior year.
Certain numbers are automatically pulled into the form from the current year's return in anticipation that the form may be needed. Additional information from the prior year return is necessary to enable the calculation to be done. If one imports the prior year return in TaxAct, the applicable information is automatically drawn in from the prior year return. Otherwise, that data must be entered into the system.