Level 6

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I believe that you might need to add additional information for this question because I don't think this one is has enough information for a definitive answer.  I will try to give some information.  First, with regard to AGI: it is difficult to understand what AGI you are attempting to get.  If it is for this year, and if you are filing without your ex, then your AGI will simply be the result of what you enter for your own income items, which are purely related to your own individual income documents.  The other person's income will not matter on your return.  (Deductions can be a significant issue if you are itemizing and if you are still married.)  But the amount that your ex makes does not appear to be relevant here if you are divorced.  I believe I might need to state some information relative to your filing status.  You filed as Married Filing Jointly (MFJ) for 2016.  MFJ is only correct if you were still married on 12/31/2016.  And if you are filing as "single" for 2017, then this is only correct if you obtained a divorce prior to 12/31/2017.  If you are still married, and if I assume that you have no dependents, then your only choices would be Married Filing Jointly (MFJ) or Married Filing Separately (MFS).  You should file Single if still married. And if not married, then only your own income counts toward your AGI.