follow the steps here
https://ttlc.intuit.com/turbotax-support/en-us/help-article/retirement-benefits/enter-backdoor-roth-...
for 2025 you will only enter the non-deductible contribution which will be reflected on Form 8606 Line 1 and 14 which will carry forward as basis to your 2026 Form 8606 Line 2 when you report the conversion on your 2026 taxes.
when you enter the Trad IRA contribution say NO to anything to with recharacterizing/moving the money to Roth IRA - you did NOT do a "recharacterization" which is a change of contribution to a direct Roth contribution. Roth "conversion" is different, and is reported by the 1099-R distribution when you get that next year there will be a question after the 1099-R to specify that the distribution was a conversion.