Upserve has a field called the Identifier. The Identifier needs to match the PLU field in reciProfity.
In order for the sales mix to import correctly reciProfity matches the Upserve Identifier with the reciProfity PLU. If you are not sure how to enter the PLU in reciProfity please read this.
Click the Gear/Setup/Options
Scroll down until you see the Sales section:
1. Choose Upserve POS from the pull down.
2. Enter your Upserve POS Username and Password
3. Scroll to the bottom of the screen and click Save