I entered the amount on the "Tell Us How Much You Contributed" online TurboTax Premier page under "Tell us how much of the above total contribution for 2018 you contributed between January 1, 2019 and April 15, 2019. (I'm preparing amended 2018 returns, but I just noticed TurboTax had not filled it on the original return.)
TurboTax shows the amount for line 4 of my Form 8606 but not my wife's.
Our traditional IRA contributions were not deductible, because my wife was covered by a retirement plan at work and our income exceeded the limit. We didn't want to make them deductible anyway, because we rolled them into our Roth IRAs (backdoor contributions).
I'm thinking about penning in the amount.
