Are you sure you want an IP PIN, a 6-digit number assigned by the IRS to victims of ID theft? There is also a voluntary opt-in program. If you live in one of the 20 states listed below, you can voluntarily opt in to the IP PIN program.
Are you asking about getting it for you, or are you trying to get IP PINs for the kids? There may be a simpler way to work all of that if you come to an agreement with the father, or whoever is legally supposed to claim the kids. I've asked someone familiar with dependent situations to see if he has some suggestions for you in this thread.
In any case, in the meantime here's some info on IP PINs:
The IRS says:
"If you live in one of 20 locations, you are eligible for the online IP PIN Opt-In Program. To be eligible for 2020, you must have filed a federal return last year as a resident of Arizona, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Maryland, Michigan, Nevada, New Jersey, New Mexico, New York, North Carolina, Pennsylvania, Rhode Island, Texas or Washington."
Folks in other states would have to either be mandated or invited by the IRS to participate after filing a Form 14039 ID Theft affidavit with the IRS.
The IRS has this PDF brochure about the IP PIN Opt-In program:
https://www.irs.gov/pub/irs-pdf/p5367es.pdf
See more info at:
https://www.irs.gov/identity-theft-fraud-scams/get-an-identity-protection-pin
Once you start using an IP PIN, you will have to use one every year from now on. You will need a new one each year. The IRS normally mails the new IP PINS in late December/January each year.
