I am trying to fix my return and i have my 2018 return where do i find my (AGI)

Line 7 of your 2018 1040 form.

Finding Your AGI

Various versions of Form 1040 reflect the AGI amount on different lines:

• Line 8b on Form 1040 (for tax year 2019)
• Line 8b on Form 1040-SR (for tax year 2019)
• Line 7 on Form 1040 (for tax year 2018)
• Line 21 on Form 1040A (for tax years before 2018)
• Line 4 on Form 1040EZ (for tax years before 2018)
• Line 35 on Form 1040NR