The program generates errors in the 1099-G if a taxpayer receives a state refund for the prior year.  If a taxpayer does not itemize, the state often does not issue a 1099-G.  Therefore, the tax preparer does not have the information to complete the form.  In my home state, I generally have that information from at least one client.  However, if a taxpayer has a refund from a state the preparer is not familiar with, the information is not available and there is no way to clear those errors.  With errors, e-filing is not possible.