How do I ammend my 2021 return for 2014-7 income.

I just found out that my wife's income for IHSS is exempt for income. I had entered the W-2 (the income was listed in box 1), so now I need to fix the problem. I found in the forum that I can add a line with a negative number, but don't know where.  I have started the amend process in TurboTax, but  what form should I add?