IND-995
How do I specify my dependent's PIN in Turbotax online?
If a dependent or qualifying person listed on your return has ever received an IP PIN, a CP01A notice, or opted into the IRS's IP PIN pilot program, that person's special 6-digit IP PIN needs to be on the return to validate their identity for e-filing.
Find your dependent or qualifying person's 6-digit IP PIN
Look at the CP01A letter they received in December or January for their 2024 taxes. IP PINs from prior tax years won't work.