Posting invoices in Billing sends entries to Accounts Receivable. Once you post the invoices in Billing, you can no longer change them in Billing. Sage only posts invoices with a status of Printed.

1. In Billing, select Tasks, Post Invoices.
2. Use the Conditions button to filter on any criteria for the invoices you want to post.
3. Click Start.

How do I print an invoice in Billing?