Thanks. But I'm not divorced. This was for my daughter who got married last year. She qualified as my dependent though and I'm claiming her to get the AOTC credit (since I paid for her college). And I had my son in law file as "Married filing separately" and check the box for "Someone else can claim my spouse as a dependent". But even though he did that it still won't let me file my taxes.
As long as the child's spouse did not claim the child as his or her dependent, and did not file a joint tax return, you should be allowed the dependent claim, assuming you qualify otherwise.
It may be that the IRS will not allow you to e-file the return, but you can mail it in. I suggest you mail it and if it is rejected again, then you will have to contact the IRS for an explanation.
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