• File maintenance > Accounts Payable > Vendors

  • Open Vendor By Name OR Entire Vendor List

  • Maintenance > Contracts

  • Create a new Contract
  • Set Active from/to dates
  • Click on the Plus (+) to create a detail (you might need to move off the line first)

  • Select a Group (leave it empty for all)
  • Set the formula percent
  • Save the Vendor