Did just before I saw your message.
He's been at practice all night. When he got home and I asked if he could log in and show me his tax return and told him why, he said, "I bet I didn't check the dependent box."
Sure enough -- that's it.
His taxes have been amended.
I'm now killing a tree (not really -- recycled paper) printing taxes to be filed by mail.
Thank you for your help.
