these are the instructions for backdoor Roth
https://ttlc.intuit.com/turbotax-support/en-us/help-article/retirement-benefits/enter-backdoor-roth-...
if line 8 is blank then you likely have some issue with the 1099-R entry or the questions after the 1099-R to classify it as a Roth conversion. Without that it's triggering a distribution.
if you IRA balance was not zero after the backdoor Roth and has pre-tax money then the backdoor may not be fully tax-free and you'll carry over some basis for future years.
