How to report after tax 401k rollover to Roth 401k? Thanks!

Hi I know I need to do Form 8606 to report roll over from my individual Traditional IRA to Roth IRA.

 

But for my Employer Sponsored 401k plan, I have After Tax 401k contribution that I rolled over to Roth 401k, and received a 1099-R.  Since they are both 401k, do I need to report this Roll over to IRS for my 2023 taxes? What forms do I need? Are there any special lines I need to fill out on my tax form? How to do that on Turbo tax?

 

Thank you so much!!! I appreciate any assistance you would kindly guide me in this matter 🙂