Although you set the option to track sales commissions in Order Entry, you specify whether a particular salesperson earns commissions, and their individual commission rates, in Account Receivable.
You use the Commission tab on the A/R Salespersons screen in Accounts Receivable to specify whether a particular salesperson earns commissions. You also specify one to five commission rates, together with the range of sales amounts to which each rate applies.
For example, a salesperson might be paid 2% commission on the first $10,000 of sales per period, and then 5% on sales over $10,000. You can edit these rates at any time, but the new rates will affect only future commissions.
To add commission rates:
Accounts Receivable > A/R Setup > Salespersons.