How to automatically deduct a percentage from an invoice

Lawson allows you to use distribution codes that allow for percentages to be negative which would create a deduction. Book the invoice at normal 100% for the expense account and use the distribution code to book the discounts to the proper GL accounts. The amount of the invoice will need to be adjusted to reflect the deductions taken.

If there is a vendor who always gets the same deductions, you can add the distribution code to their AP10 Vendor Record and it will always default onto invoices for that vendor.