If someone else's e-file is being rejected because you made a mistake when you said you could not be claimed, they do not have to wait for you to amend. Waiting will not help them at all. They can file the return that claims you as a dependent by mail, since the IRS will not reject a mailed return, or they can get an IP PIN to try to e-file their return that claims you. You still must amend----no matter what they do to remedy their problem--- but they do not need to wait for you.
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.**
