Deductions & credits

or maybe the roth ira contribution limit is based on my total earned 1099 income?

 

and my solo 401k contribution limit is based on my Schedule 1, Line 3 less self-employment tax deduction which is on Line 15 of Schedule 1 ?

 

or maybe they are both based on the same number?

 

And wow this is confusing

 

I just wish I knew how much I can contribute without getting into trouble