Thank you for replying, Johncallagy. I do know one ProSeries user who was so frustrated that they just mailed it in, but it is good to know another CPA firm was able to e-file in ProSeries with the attachment and presumably with the disable e-file error mechanism. 

Yes, Lacerte should be providing more guidance for 2023, as well as the IRS for that matter. More of these filings will be needed for 2023.