IRA goes on line 4a and 4b. Line 5 is for pensions and 401k distributions. So first of all is your 1099R reported on the right lines? Then it's ok for the "b" taxable line to be more than the "a" line. Do you have more than 1 1099R? If the taxable amount on line b is the same as the gross distribution on 1099R box 1 then it doesn't show the amount on "a". The a line is not important.
Is your 5b just more than 5a OR actually 5,000 more than the taxable amount from your 1099R box 2a? The best way to fix it is to delete the 1099R and re enter it again MANUALLY.
