What number to use in place of Form 6251 Line 4

[akfalk]

I am entering hubby's investment info and it's asking what we used for AMT last year, Form 6251 line 4.  Problem is, TurboTax did not calculate this last year as it said it was not needed.  The form is not in the file and I always save all of the forms just in case.  The help TT help box says:  "If you don't know your AMTI, most people will get the same result using your "regular" taxable income (2021 Form 1040, 10)."  Line 10 is labeled "Adjustments to income from schedule 1, line 26."  This can't be the correct amount to use, is it?

[hbl3973]

akfalk,

Follow the instructions for Line 1 on 2021 Form 6251 .  That is what was intended.   I'll report the typo.