Here is the IRS guidance, and It sounds like it may take a little time.
If you're concerned, you can file for an extension for your tax return. File Your Extension Online - Simple Step-By-Step Process
"The fastest way to receive an IP PIN is by using the online Get an IP PIN tool. If you wish to get an IP PIN and you don’t already have an account on IRS.gov, you must register to validate your identity. The IP PIN tool is generally available starting in mid-January through mid-November. Select the button to get started. Get an IP PIN "
If you’re unable to verify your identity online or with the Form 15227 process or you are ineligible to file Form 15227, you may make an appointment for an in-person meeting at a local Taxpayer Assistance Center. Please bring one current government-issued picture identification document and another identification document to prove your identity. Once we verify your identity, you will receive your IP PIN via the U.S. Postal Service usually within three weeks. You will then receive your IP PIN annually through the mail.
For more details lease see Get An Identity Protection PIN (IP PIN)
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