You do not have to enter sales invoices in Sage 50. You could certainly save data-entry time by only entering receipts. If you are a cash-basis company, you might figure that there is no point in entering invoices since you only record income when you receive cash.
However, even for cash-basis companies, there are still important benefits to entering invoices in Sage 50.
Aging
If you enter customer invoices, Sage 50 will compute and track aging for receivables and payables, even for cash-basis companies. This includes automatically tracking discounts for timely payment. For sales, you can calculate finance charges for overdue customer invoices. In addition, you can use the Collection Manager to analyze receivables and to generate collection letters.
Projected Cash Flow
Cash-basis companies that record customer invoices can still accurately project cash flow. The two main tools for this in Sage 50are the Cash Flow Statementand the Cash Flow Manager.