If you don't remember your 5 digit PINa, you do have another option moving forward. The Self-Select PIN is a random 5-digit number that you enter as your electronic signature when e-filing your return. You can reuse your Self-Select PIN from last year or enter your AGI from last year's tax return.
For identification purposes, you need to enter either last year’s Self-Select PIN or your AGI. The IRS requires your AGI for identity verification. Please read the TurboTax Help link, listed below, to learn how to locate your AGI.
https://ttlc.intuit.com/replies/3301618
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