Did you receive an error code? If so, could you post here.
Or if it was one of these IND-031-04 or IND-032-04, go here E-file reject IND-031-04 or IND-032-04: The AGI or Self-select PIN from last year doesn't match IRS ... for the solution. You'll have to actually click the blue "Solution" hyperlink once you go to that FAQ, in order to view the steps you need to take.
If you have already done the steps at the above link and your AGI and PIN are correct, go here What if I entered the correct AGI and I’m still getting an e-file reject? for how to handle this situation; as you may have to paper file the return if the information is accurate and you are not able to e-file.