Hello. I have a thermal printer Model SNG-5890, 58mm. The idea is to give a ticket to customer in each sale, but i can't run the printer. Can you help me to configure?

Welcome to the Community, geovaldes2.

I'll assist you in printing a ticket so you can give them a copy of their purchase.

Just to be sure, are you referring to the sales receipt when you say "ticket for each sale"? Any information can help me find a solution to your problem.

Any printer will work as long as it is connected to the device from which you are accessing QuickBooks Online. After installing the printer, please restart your computer or device so that the system can detect the new hardware. 

Let's perform a few troubleshooting procedures below if you're still unable to print:

1. Check the printer paper if it's loaded correctly.
2. Click the Start menu, then choose Control Panel.
3. Double-click Hardware and sound or Printers and Faxes.
4. If the printer shows Offline, right-click the printer and select Use Printer Online or Set as Default Printer.
5. Open QuickBooks and try to print the ticket you created for your customer.

I've attached this link to guide you in personalizing your sales form in QuickBooks Online for future reference: Customise invoices, estimates, and sales receipts in QuickBooks Online.

If you need further assistance printing your sales form, let us know. We're available to help you at any time.