I converted $800 after-tax 401k to Roth IRA (Mega Backdoor) last year, but just realized I didn't max out pre-tax 401k. The $800 is already on my 1099R form. I heard the mega backdoor won't work if pre-tax 401k isn't maxed out, but I'm not sure what tax problem there will be. Is the rollover legit? Should I withdraw the $800 from my Roth IRA?
Thanks a lot for the help.
