I've filed them before.  Never had an issue.  Have yet to file one this year though.  

Not sure why you are having issues.  Is there anything out of the ordinary about the return?

Release date page says the forms are ready to go.  Try running an update.  If that doesn't work try running the repair updates function.

He files a PA return, which I used to attach to NJ and so his wages are not taxable to NJ and he receives everything he paid NJ.  Client does not like the fact it has to be mailed for obvious reason and then it takes till July to September for his refund and he has to pay PA by 04/15/26.  Last 2 years I have gone directly onto NJ website and filed them but that isn't taking 2025.  Proseries says its NJ, NJ says its proseries.  Last year 1st client went and after that I had to do online or they had to mail

Thank you spoke to a support person and he said it isn't allowed.  

NJ and PA have reciprocity.  There must have been incorrect NJ withholdings (reflecting NJ withholdings) on his PA W2?  That may be what is triggering having to mail the return. 

With that said, there is also a NJ Form I believe you have to file, NJ 165:

Employee’s Certificate of Nonresidence In New Jersey, Form NJ-165

After attaching that form, see if it allows the efile.  I don't think it will, but give it a shot. 

You have to attach your completed PA 40 to the NJ Non-Resident return, showing that you taxed all income if you do mail the NJ Non-Resident return.  

I've never had problems with a NJ Non-Res to get PA taxpayers NJ withholdings back.... Hope Intuit didn't break something....

It's a pretty common mistake that employers make who aren't familiar with reciprocity.

NJ 165 gets completed by the PA taxpayer and is retained by the NJ employer. It is not filed with the state. Its  required certification from EE to ER to substantiate  not withholding NJ taxes due to NJ/PA reciprocity 

Thank you but not all NJ employers will accept the NJ 165 and not with hold NJ state tax

Some wont.  When they don't follow the rules, you end up in situations like this.