So you already set up printing by following the instructions here. But why isn’t it working yet? There is no receipt that prints after you finish a sales transaction. Worry not, because there’s one last thing you can check.
To print the receipt, it needs to show up as a popup. So if the popup blocker is turned on on your browser, the receipt would not show up. No receipt preview = no receipt printing.
Here are instructions about popup blockers for every browser: