Mine was definitely right too. I submitted 3 times and was rejected each time. I ended up putting zero because on the IRS site they mentioned about putting zero if you filed late last year. It didn't apply to me but I tried it anyway and it worked. I think the IRS is a bit disorganized at the moment. I e-filed last year on May 1 and received my refund in December. Long story less long, put the zero.
