1099r where is this distribution from?

Hello, I made a partial ROTH conversion of $50,000.  I am over 59 1/2.  Prior to the conversion, in December of 2020, I completed an IRA rollover, out of a 457 B plan I held thru a former employer, and into a IRA held with Fidelity.  I then executed a partial ROTH conversion out of this rollover IRA, establishing a ROTH IRA.  Under this circumstance would I select "Current year conversion from a traditional IRA to a ROTH IRA".  I see nothing regarding 457B. That account account no longer exists anyway.