What is my spouse's adjusted gross income from last year? Is it the same as mine if we filed jointly?

[sceptre2017]

If you filed a joint return last year then your AGI should be the same.  That being said, did you attempt to file married filing separate and then amend to file a joint return?  If you did, then you may need to use the AGI from the original filing. If that does not work, then file an extension and mail in the return tomorrow.  Technically, if you are in a refund position you will not have any additional penalties for filing late, however, at this late hour you may want to file an extension and then try a "0" for your wife's AGI; or if you amended your return last year - see if you can find the original AGI from the originally filed return; of mail the return tomorrow.