The IP PIN (Identity Protection PIN) is a 6-digit number while the e-filing PIN is a 5-digit number. The 5-digit e-filing PIN does not change year to year unless you take physical action to change it.
The 6-digit IP PIN *does* change every year. The IRS mails the new IP PIN every year in the late December to early January timeframe, to the address listed on the last tax return filed. If you did not receive your IP PIN in the mail for any reason (including you moved and did not notify the IRS of your change of address) then see https://www.irs.gov/identity-theft-fraud-scams/retrieve-your-ip-pin for the options available to you.
