There seems to be some confusion in earlier comments in this thread as to who needs to get the IP PIN in a similar situation. With this type of rejection of a parent's return caused by one's dependent claiming himself/herself on their return, only the primary taxpayer (the first-listed filer) on the parents' rejected return needs to get an IP PIN in order to efile. A spouse (if applicable and filing jointly) and dependents themselves do not need to get an IP PIN, unless they were previously required to have and use one for some other reason. The IRS in the article below says:
" The taxpayer listed first on an e-filed tax return claiming dependents can provide their current year IP PIN when they file. If they do, the return will still be accepted. The spouse (if married filing jointly) and the dependents on the tax return don’t need to provide an IP PIN if they don’t have one."
The dependent still has to file an amended return to state that he/she can and is being claimed by someone on another return.
IRS Reference:
https://www.irs.gov/newsroom/irs-takes-steps-to-help-prevent-refund-delays-by-accepting-duplicate-de...
