How can I associate a sales person with a particular invoice?

One sales person may be associated to a particular invoice. You can do this by,

• Opening the specific invoice.
• Go to the ‘Sales person’ field.
• Select an existing sales person from the drop-down to associate him/her with the invoice.

• You may also create a new entity if a new sales person is going to be handling that transaction. To do so, click on Manage Sales Persons.
• In the pop-up that follows, click on + New Salesperson, enter the name of the person and select the Save and Select button.

• You can also disable or delete existing sales persons from here.
  
• Therefore, the new name you enter will be stored under the ‘Sales person’ drop-down whenever you create a new invoice.