Interesting...one of the IRS FAQs for the IP PIN:
"If we assigned you an IP PIN, you must use it to confirm your identity on any return filed during the current calendar year. This includes current year returns as well as any delinquent tax returns."
So it sounds like it is used for any tax year's return, filed after the IP PIN was assigned.....at least for the one year that the IP PIN is still in effect.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
