General Instructions
Use Schedule 3 if you have nonrefundable credits, other than the child tax credit or the credit for other dependents, or other payments and refundable credits.
Include the amount on Schedule 3, line 8, in the amount entered on Form 1040, 1040-SR, or 1040-NR, line 20.
Enter the amount on Schedule 3, line 15, on Form 1040, 1040-SR, or 1040-NR, line 31.