If your child's other parent will be claiming the child, alert them asap so they know their e-file will be rejected if they try to e-file claiming the child. They do NOT have to wait for you to amend. They can either print, sign and mail their return that claims the child or they can get an IP PIN to try to e-file.
For the other parent:
GET IP pin in order to e-file if your dependent’s SSN was claimed on another return
https://www.irs.gov/newsroom/irs-takes-steps-to-help-prevent-refund-delays-by-accepting-duplicate-de...
https://www.irs.gov/identity-theft-fraud-scams/get-an-identity-protection-pin
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
