My employer sent out a corrected w2 the day after I filed b/c they failed to check box 13 retirement plan, even though they put the correct $ amount in box 12b code D. My return has been in pending status for 24 hours. My employer claims I do not need to amend my return. Is this true even if I made non-deductible contributions to an IRA and converted the entire account to a Roth IRA in the same year? Thanks.