On the form 1099R if you leave the line for (2a) Taxable Amount blank, and check
Taxable Amount not determined, this will then bring up all of the necessary
screens for you to show what actually happened. You still have to complete the
form 8606, but don’t put in anything for a “contribution” as what you have is a
“conversion”. This will then shows up in
the completed form 8606 in the correct place “Part II 2018 Conversions
From Traditional, SEP, or SIMPLE IRAs to Roth IRAs”.
