Ok ... the OPM form 1099-R does not follow the IRS form format which is really not a surprise is it ? So they often do not enter the taxable portion and leave it to you to compute how much is taxable. The program will do this IF AND ONLY IF you do NOT enter a zero in box 2a. Unless you know of a reason the entire box 1 is taxable. So look at your 1040 ... was all of the distribution reported as taxable ?
