btw, the response to this post had a recap of the steps to enter a backdoor Roth so you can check all the steps and inputs you need to hit
https://ttlc.intuit.com/community/taxes/discussion/turbotax-incorrectly-showing-penalty-for-my-backd...
also this article
https://ttlc.intuit.com/turbotax-support/en-us/help-article/retirement-benefits/enter-backdoor-roth-...
