HPLaserJet-Tank MFP 2604sdw Wireless Black & White Printer Prefilled With Up to 2 Years of Original HP-Toner (381V1A)

Q: Has anybody ever actually got hold of their “24/7” tech support, Because I can’t?

Yes, but the effort was FRIUTLESS, no solution was achieved.

Q: Can I remove the tank if I want to store the toner for a couple months while I’m away?

There's really no need to remove the toner tank. Because toner is a dry powder, it's not like a period of non-use will make it dry up and stop functioning When you're done using the printer, make sure you shut it off with the printer's power button so it can do a full shutdown.