YES IRS reject code DOES indicate which dependent was reported on another tax return.
IND-501-2 refers to the second dependent being reported on another return.
IND-507-6 refers to the sixth dependent being reported.
If the dependent TRULY should be YOUR dependent - child lived with you more night than with the other parent MAIL the paper return that was rejected to the correct IRS service center for your zip code WITH a cover letter indicating which nights the dependent slept at YOUR house. INCLUDE letters form the physician AND the school on their letterhead confirming the dependent's address is YOUR address, as shown on the tax return.
It MAY take some time to sort this out, but it WILL be resolved in your favor when time permits.
Pilotgal8 Enrolled Agent
