Placing myself into your situation, this would be tough especially if your business is about shipping goods. I got a suggestion about this since we're unable to provide information about setups for specific label printers.
I would suggest reaching out to DYMO's support to check if you need to enable something or like an Add-in, so you can extract data from QuickBooks. You can also try searching for this online (Google). Then, if you find a public post shared by other users, please follow their instructions with discretion.
I believe that searching for posts online or reaching out to DYMO's support would be our best bet right now.
If you have other concerns about printing or anything with the new QuickBooks, please don't hesitate to go back to this thread.