Square Point Of Sale app integration settings.
You can open Square integration settings either via “Advanced settings”, down to the bottom:

Or there is an option to access settings screen when error happens in Square app in response to a taximeter request:

Following options are available:

Tender types.
Pick the tenders that apply to your Square account. Only select options your account is actually set up for — otherwise Square returns an error. More information on tender types.
Clear default fees.
If YES, default fees (i.e., taxes) are not automatically applied to the payment in Square Point of Sale
Auto return.
If YES, Point of Sale will automatically switch back to the requesting application after a timeout elapses from the receipt screen. If NO, merchant must tap New Sale in Point of Sale to switch back to requesting application on the receipt screen.
Location ID.
The business location’s Square-issued ID. Leave empty if in doubt. More information (square website) on locations.
If you decide to fill this field, note that it’s not the location’s name or nickname — it’s the ID visible in the browser URL when you edit the location.