@DeanM15 I believe I need to amend my 2018 taxes based on the previous answers above because I never reported that I contributed to 2018 IRA. I did not have a form 8606 for 2018.
In the link you provided, the section that says "Enter the contribution amount. If you contributed in the following year before April 15 for the previous year, enter the contribution in both boxes." is what I need to fill out for 2018 in order to show my basis of $5500 for that year.
Then for 2019 for the section "Let's find your IRA basis" I would carry that $5500 forward.
That is my understanding, please correct me if I'm wrong.
