In your settings under ProConnect software there is a section for EFin authorization and I do not believe you can electronically file any returns without this authorization. You can use the software and paper file only without an EFin. I believe the software is in compliance with the IRS rules requiring a tax preparer to have an EFin in order to electronically file. Refer to the IRS website.  https://www.irs.gov/e-file-providers/faqs-about-electronic-filing-identification-numbers-efin.