1. Click on Settings Module

2. Clic on the General Settings

3. Click on the Invoicing tab.

You will see four setting categories: Layout, Numbering, Closing invoices, and VAT Breakdown.

In the numbering section you can set a prefix and suffix for the numbering of your invoices. This means the digits that come before and after the number of the invoice:

You can set the prefix and suffix as either letters, numbers, or use the tags {m} and {y} for dynamic numbering that will correspond with the invoices month and year created.

If you set both the month and year as the prefix, they will show together before the invoice number.

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