How do I sell items to a customer who has an account?

Dan,

SO Manager | File | Configuration | Accounts tab | put in the month end date.

SO Manager | Database | Tender Type | Create a payment type called Store or Terms Account.

SO Manager | Database | Account Type | Create an Account type called the same or whatever you like.

In the SO Manager | Database | Customer | Properties | Account Information tab, pick one of the Account types you created.

At the end of the month, SO Manager | Database | Journal | Close Billing Cycle | print statements.

When the check come in, POS | assign the customer | Shift+F4 to apply the payment.

When you sell something to one of your account customers, select the Tender type called Store Account you created in Step 2.