My daughter submitted her own tax return while she was a full time college student and qualified as my dependent (income under the limit). My return was just rejected because she must have forgotten to check the box indicating someone else can list her as my dependent. In order to get the $500 credit, I need to mail my tax returns and then have her amend her federal return (she had no income in my state). However there is no "box" to check on the form 1040-X. Should I just have her write in "I was my father's dependent for tax year xyz" in the box at the bottom, or is there a different form used to add this?
