Hi garreth!
We thought you were confused why there is letter A in your invoice number. That's why Zac said this is not the default setup and you can remove it.
Anyhow, we can actually add letters as a suffix or prefix. This is a common practice in businesses with different types of invoices. However, only the numbers will increment as you create more invoices. Letters do not change because they are generally used to identify the type of invoice.
Hope this clears up everything.
If you have additional questions, you can always go back to this thread. Have a good one!
