2 separate issues I think
1. on the 1099R try "did a combination of rolling over, converting, or cashing out the money"
and there should be a further question about how much was converted
(this question flow changed in the other desktop products for 2025 to match online so it doesn't match the online help article below if that is the source of confusion - what you are seeing here is the older question flow)
https://ttlc.intuit.com/turbotax-support/en-us/help-article/retirement-benefits/enter-backdoor-roth-...
2. for the contribution there should be a question for deductible vs. non-deductible but #9 "Any Nondeductible Contributions to NAME's IRA?" below refers to prior year contributions and then asks about basis carryover I think. There should be a question about making it deductible and if not should assume it's non-deductible. This shouldn't depend on the answers to the 1099-R these are separate transactions but try fixing that anyway and go thru this again. What YEAR is this for?
One general comment, what you've laid out below is a contribution for YEAR done in YEAR+1 for $6000 and a Roth conversion for $6000 - but was this 1099-R in YEAR from a prior contribution? The contribution can be back-dated to the prior tax year, but the Roth conversion applies in the calendar year it is made (but you'll have a clear 1099-R for the year in which it applies).
