Configure Sales Tax, Categories, Prompt Accounts, etc.

For optional Receivables steps, configuring Taxes, Categories, Prompt Accounts, and Finance Charges, use the Customer/Configure window. Press F1 at any field where you need Help.
21st Century Accounting Knowledge Base
https://www.c21accountingsoftware.com/kb/
https://www.c21accountingsoftware.com/kb/viewtopic.php?f=11&t=300