until you finish entering everything that is shown as refund /balance due is not final. are you filing separately? almost always the tax bill is higher, you lose certain credits, IRA phase-out starts lower.
if one itemizes both must itemize ( a deduction claim by one can't also be claimed by the other) or you must both use the standard deduction. you also must use separate accounts otherwise the second return entered will completely overwrite the first. a mistake that some make is one itemizes and the other uses the standard deduction. as stated this is not allowed
if you're filing jointly using the innocent spouse election look at form 8379
