E-file reject code IND-507 usually means that someone else has already claimed your dependent on their return. This could be the other parent or even the dependent themselves. The IRS doesn’t allow a dependent to be claimed on multiple returns, and so they reject any extra attempts to claim the same dependent.
For confidentiality reasons, the IRS can’t disclose who claimed the dependent, but there are two ways to resolve this reject code.
First, check that you've entered their Social Security number(s) correctly
Sign in to TurboTax and select Fix my return.
On the next screen, select Start or Revisit to view the Social Security number(s) you’ve entered for your dependent(s).
Double-check those numbers listed with their Social Security card(s). The IRS uses the information directly from the Social Security Administration to verify the info on a return.
If the Social Security number is incorrect, you can update it and continue to refile your return.
If the Social Security number is correct, you have two options
If you want to claim your dependent, you’ll need to print and mail your return. The IRS will contact both claimants to determine who rightfully gets to claim the dependent. Once they decide, they'll adjust your refund or amount owed accordingly.
On the screen that lists your dependents and Social Security numbers, answer Yes and Continue to print your return. We’ll include instructions on how and where to mail it.
Not using TurboTax Online? Select your version below for instructions.
It's possible that somebody filed a fraudulent return using your dependent's info. If you think this might have happened, look at these identity theft resources: