I encountered this in TT Deluxe 2021 with my daughter's returns. Like others, I can print/save absolutely everything as PDF just fine, but not the "print and mail these forms to the government" ones. Identical error popup as shown in other posters' screenshots.
It's especially frustrating and ridiculous that the language of this requirement and the error message are completely devoid of any specifics. It doesn't even indicate which "government", let alone which forms. What's the point of being so vague??
In our case, when I looked closely at the version of the returns saved during the TurboTax e-file process (not beforehand), I found that the NM state return had a new form which was not there before: the PIT-8453. This is an authorization for third-party e-filing/transmission, and the Filing Instructions page described what to do. This new form was included just fine as a page within the overall PDF copy, but would not save/print on its own. Her California non-resident return had a similar page in it after starting to e-file (8453-OL) but that one specifically said *not* to mail it. The NM form wanted her to attach her out-of-state return to the PIT-8453, even though it was included in the electronic filing - or at least, it was included in the "Filing Only" PDF copy of the NM return.
A possible workaround if you use Microsoft Defender on Windows 10 is described here:
https://ttlc.intuit.com/community/after-you-file/discussion/re-error-in-converting-your-forms-to-pdf...
In my case, I use Norton 360, so Defender is not active. But even after I excluded TT2021 from Data Protector in Norton, I still got the same error.
This is a ridiculous bug which has inexplicably been around for years. At the very least, Intuit needs to fix the "Print/Save" instructions to provide actual information.
