Retirement tax questions

I have the same issue. I made a first time withdrawal from an IRA. It was a rollover from a 403b account and the contributions were previously taxed in NJ. At first I erroneously selected "no" for the question about first year for withdrawal, but then went back and changed my answer to "yes" and then entered the amount previously taxed.  However, I still get the error "Pensions, Annuities, and IRAs Wks - TP: Part A, Line 4a and Part A, Line 4b should not both be entered." Line 4a has the correct amount; line 4b is 0. TurboTax will not let me efile the return, and I can't delete the form and start over because I've already selected and paid for efile. I have been through the whole return several times and nothing changes.