Any compatable printer will do this for you no problem.
(If someone needs a till draw but doesn't need a printer it's still best to go this route over a USB draw too).
You need to know if you want an ethernet printer (best option as long as you can run the cable from your router), a wifi printer (OK but can be troublesome to set up), a USB printer (limited use) or a BT printer (££ and limited use).
You can check out all the printers confirmed for use with Square here.
I think over the years all of the receipt printers I've bought have been from eBay and used.
If you want a fast/easy "what should I buy?" answer then it's the Star mPop till draw and printer.
