J Q, I do a LOT of senior citizens that have trouble on the net. I'm seeing 2 day trips for my people, first for the class because they are worried about their licenses expiring and a second for me to upload their cert (when who knows that will be) kinda like the PITA buying a gun.
The only solution I see at this time is for you to scan the signed certificate and keep the file on hold until the window opens to upload, then log into their account and upload the certificate . . .
That's what I was thinking. I would need their login info. That puts responsibility on ME to keep the STATE's system working. It would be much easier it there was the option to file now OR later, not just shut down the portal.