I know this is from last year, but same thing happening to me this year!  Just a W-2 return and I can't e-file because of the 2210!  I tried all of the solutions mentioned (0 in box 8, checked the boxes, deleted the form, etc...)  and still can't efile!  

Using Proseries Professional....

Oh, yeah...and filed one on H&R block and the person already got their refund!  What is up Proseries???  I think I want my money back....