Roth Conversions from Trad IRA

In 2023, after meeting al my RMD requirements, I converted 15k from my Trad IRA to my Roth. This was done within the same investment company. This was reported on my 2023 Form 5498 and was included as part of my gross distribution on my 1099R. There were no questions on Turbo Tax regarding Roth conversions, so I opened Form 8606 and entered the amount there. After completing that section I was told I had a Penalty for excess contributions. I have done this in the past with no problems, How should this conversion be entered in Turbo Tax Deluxe and has my investment company provided the correct tax forms.