My guess:

Since 1099-Q has never been a strong suit for IRS to match, this is likely to fall in that black hole where you just document that NONE of the distribution or earnings is taxable. Warn the client that even with all the software worksheets that show NONE of the reported 1099-Q is taxable, the worksheets never make it to IRS and they could send a letter. Tell them all is well and you have the documentation to back up the facts if they ever come and ask.

Just a general question - Have you ever had a client get a 1099Q inquiry? I have only ever encountered one. 

https://www.irs.gov/publications/p590a#en_US_2024_publink1000129982