Location: Bookkeeping module > Dashboard > Client specific > Settings > General Settings > Customise Sequence
Watch here how to customise / edit your invoice sequence
Customise sequence shows the list of transaction types, example: Sales invoice, Credit note, Quotation.
Enter the prefix for transaction type for ex: Sale invoice (SER). Credit note (CRN)
Start no. starting number for the invoice and save.
Postfix: Postfix means after invoice number you can add.