Capital Loss Carry Over - Help

Hi - I'm working on my Capital Loss Carry over, and it's asking for form 6251 from my 2020 taxes.  I do not have form 6251 from my 2020 taxes.

 

I'm trying to figure out what I am supposed to put in this box.

 

In the "On Demand Tax Guidance", it sayd you can use your "regular" taxable income from 2020 Form 1040, 10.

 

I do not have anything in line 10.

 

If someone can help, I would appreciate it.