Have you ever filed before? The IRS would have your address from last year's tax return. Is this your first year filing a tax return?
An IP-PIN might have been obtained by your parents, or another taxpayer who was authorized to claim you as a dependent, if someone stole your social security number and tried to file a tax return in your name or claim you as a dependent.
Start by creating an account on the IRS web site in your own name, and then you may be able to retrieve your IP-PIN online.
https://www.irs.gov/identity-theft-fraud-scams/retrieve-your-ip-pin
It may be tricky to verify your identity to get the IP-PIN if the IRS has been previously notified that you were a victim of identity theft. You may have to go to your local IRS office, appointments are usually required.
https://www.irs.gov/help/contact-your-local-irs-office
You can print your return, sign it, and mail it in without the IP PIN, but processing might be delayed.
