Log into the system, and then access the Setup menu. Select Shopify tab on top. Input your myshopify.com URL name, then click Connect.
A web browser will be open. You may need to login to your Shopify web store to authorize SooPOS to access your web store. Click Install App to continue.
Back to SooPOS. Check rest of settings and click Save.
You will then be asked to import products and orders.