You can find it in the same URL posted by SweetieJean (<a rel="nofollow" target="_blank" href="
https://www.irs.gov/publications/p590a#en_US_2018_publink">https://www.irs.gov/publications/p590a#en...>), just search for Worksheet 2-1. Modified Adjusted Gross Income for Roth IRA Purposes
