Retirement tax questions

I tried your recommended steps but again, upon starting the review process, get the same error message as when I first finished the return:  "Check This Entry. Form 1099-R (name of provider): Partial Roth conversion amount cannot be greater than the amount on line B1, the amount that potentially could be converted to a Roth IRA".  

 

What I did in 2023:  took out a distribution from a traditional IRA, some of which fulfilled my RMD for the year and the rest I converted to my Roth IRA.  I cannot figure out this whole B section in the TurboTax 1099-R form where this error check points me.

 

Any suggestions?  Thanks.