My ex and I couldn't agree on how to file the tax return while we were divorcing. I had the kids with me and he was sporadic in paying child support, however he wanted to file jointly and split the refund. I did not TRUST him to actually give me 1/2 of the refund yet I thought that would be most fair. I filed an extension that year...he filed seperately and claimed both children. The court ruled on it about 2 months later and said that we were to file jointly and split the refund 50/50...he had to amend the tax return (pay all fees associated) and give me half of what he already received and half of the amended return. I could have just agreed in the first place, but because I didn't trust him I wanted the courts backing on it in case he did not give me my half.