That is a strange behavior of TurboTax when the 1099-R has not yet been entered that populates the rest of the 8606. Line 4 should show the contribution for 2019 when made in 2020 but it is immaterial unless there is a 2019 distribution also, then line 4 will be populated. Otherwise line 4 is not needed. That is probably a TurboTax bug because the 8606 form rules say it should be on line 4 whether there is a distribution or not, but practically it makes no difference.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
