In your dashboard, click on the avatar in the top right corner, and go to Account Settings → Account Services.
Click the "Connect Square" button, and follow the prompts to authorize Paperform to have access to your Square account. After authorizing Paperform, you will be returned to the Account Services page and Square will be in the list of connected services.
Use Square on a form
In the form editor, go to Configure → Payments, and choose the Square account from the list of available payment accounts.
Under the "Square location", choose an appropriate location.
If you would like to take web payments, choose "Web Payments" for the Square checkout type. If you want to use the Square POS app on your compatible iOS or Android phone, choose "Point of Sales" instead.
(optional) If you are using POS, you can select the allowed POS methods.