I withdrew $59,406 from my Taxable Account as RMD in 2020. I put $29,406 back and converted $30,000 into a ROTH. How do I report this?

Incorrect Answer deleted

Unfortunately this is a situation TurboTax does not support on a single 1099-R.

You must split the 1099-R into two 1099-R's both the same except for the box 1 and 2a amounts and box 4.

On one enter only the amount rolled over in box 1 and 2a.  Enter that 1099-R and say you "moved the money" and rolled it all over.

On the 2nd 1099-R enter the amount converted to the Roth in box 1 and 2a and the tax withheld in box 4.    Enter that 1099-R and say you "moved the money" then say you did a contamination of things and enter the amount converted (The box 1 - box 4).