You can set up credit terms for all new customers and vendors

You can use the Preferences window to establish a set of credit terms for all of your new customers and vendors. To do this, follow the procedure To change the default credit terms for new customers or To change the default credit terms for new vendors. The terms you set in these windows will be applied only to new customer and vendor cards you create.

For customer cards already created, credit terms can be assigned in the Selling Details view of the Card Information window; for vendor cards already created, credit terms can be assigned in the Buying Details of the Card Information window.