Here's the IRS link regarding the first time filer PIN: https://www.irs.gov/e-file-providers/self-select-pin-method-for-forms-1040-and-4868-modernized-e-fil...
But TurboTax won't allow a blank PIN. That's the problem.
"If the taxpayer has never filed a tax return or did not need to file a prior year tax return, what amount do they enter for the prior year original AGI or prior year PIN?
Enter zero ("0") for the original AGI. Do not leave this field blank. The return will reject if the field is left blank for a zero amount. However, the prior year PIN field should be left blank."
