Your total capital gains will show up on Line 13 of Schedule 1, then the number is carried to Line 6, Form 1040.
The amount on Line 6 includes all of your capital gains. If there's a difference between what's on line 6 and your net amount from stock sales, it's possible you may have had a capital gains distribution, paid in the form of a dividend.
Go through all your 1099-DIVs and see if there's not a capital gains distribution in there.
If that doesn't solve your problem, please post back to this thread.
