Nothing on a 1099-R goes to the IRS if no box 4 and the IRS will not reject for a duplicate 1099-R. All IRS rejects will have a reject code that identifies the form and reason in the code.
It is probably an internal TurboTax check to prevent accidentally submitting duplicate amounts that has been a problem in the past when a user enters a 1099-R and also imports from the financial institution. Two 1099-R's will be reported.
I have not seen this in the past so it might be something new.
**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.**
