if your AGI number mismatches the IRS database, and you did not keep the five digit PIN from last time to use now,
your option is to file on paper via US Mail.
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How to find the AGI https://ttlc.intuit.com/replies/3301618
When did you file 2017? If it was late in the year try putting in zero for the AGI. And see this, https://ttlc.intuit.com/replies/5595742 If you can’t get it to efile you will have to print and mail it.
