@sjrcpa is correct.  If you don't believe it, do your own research.  You can start by reading the 1040-X instructions.

Example.

Dillon is filing Form 1040-X to amend his 2018 tax return. He sent a check for $1,500 with his original return, reflecting a payment of $1,400 in taxes and a $100 estimated tax penalty. When completing Form 1040-X, Dillon enters $1,400 on line 16 (the check sent with the original return minus the $100 penalty).