Using the capital loss carryover

[leeac]

In the last section for form 6251 help when using the capital loss carryover calculation it says:

"What if I don't have Form 6251?

...

If you think your AMTI might be different than your "regular" taxable income (Form 1040, line 10), you'll need to determine what your 2019 Alternative Minimum Taxable Income was and enter it here. If you don't know your AMTI, most people will get the same result using your "regular" taxable income (2019 Form 1040, 10)."

I'm assuming it means 11b not 10 as that's the QBI line

[JohnB5677]

You are correct. 

In 2019

• "Taxable Income" was on line 11b, and
• "Adjusted Gross Income" is on line 8b

In 2020

• "Taxable Income" is on line 15, and
• "Adjusted Gross" Income is on line 11.