For the 2018 Tax Return:
Complete Schedule 1.
Add the values from the 1040 Lines 1-5.
Then add any amount from Schedule 1, Line 22. This will give you the value for Line 6.
Then Line 7 instructions are "If you have no adjustments to income, enter the amount from Line 6; otherwise, subtract Schedule 1, Line 36 from Line 6." to give the value for Line 7.
Hope this helps!
