I didn't take the RTRP test, I did have to pass a test for California to be a CRTP (California Registered Tax Preparer) which also gives me the CE credits each year to patriciate in the IRS AFSP similar to a RTRP

https://www.irs.gov/tax-professionals/annual-filing-season-program

YES, all preparers should have to do some kind of CEs for this job!  For IRS to let any bozo that can obtain a PIN prepare returns is unacceptable.  We see some crazy uneducated preparers ask questions in here!