Connecting Square for Retail Point of Sale
From Spiffy Stores Knowledge Base
Connecting your Spiffy Store to a Square for Retail Point of Sale system is a very simple task, and you'll be able to set it up in a matter of minutes.
Firstly, you'll need to make sure that the you have access to the Square Sales Channel feature.
Go to the 'Preferences -> Sales Channels' page. This will show you if you currently have access to the Square for Retail Sales Channel on your current plan. If necessary, you can subscribe to a Point of Sale add-on to give you access to a single Point of Sale sales channel.
Activating the Square for Retail Sales Channel
You should first make sure that you have a Square account and have signed up for the Square for Retail Point of Sale product. You can get started here - https://squareup.com/au/en/point-of-sale/retail