Retirement tax questions

There are two problems:

1) The IRA/SEP/SIMPLE box can only be checked if this was  distribution from a Traditional IRA.   If it was then code G is not allowed.

2) Unless all of the distribution was after-tax money (highly improbably) then box 2a cannot be zero.   That makes the entire distribution tax free.  More then likely if this was a distribution form a 401(k) plan then the issuer of the 1099-R coded it to be rolled into a Traditional IRA and not a Roth.  This can happen when you instruct the IRA custodian to deposit the check into a Roth and not a Traditional IRA as specified by the issuer.

So was this a 401(k)?
IS the IRA/SEP/SIMPLE box on the 1099-R checked?
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**