Document Numbering is usually set up at SAP Business One implantation, but there are a lot of useful cases that you may want to expand your document numbering and your document series.
To achieve Document Numbering, go to Administration > System Initialization > Document Numbering. In the window, we are able to see the default series, First number, Next No, and Last number of this series in each document.
To extend the Document Numbering, click the blank box which in front of the document, and add the name and all other information you want in the new window. Finally, choose a default and update.
The A\R Invoice as the example shown below, will have “test 1” and start from 1500.
For converting the existing master data codes, we may go to Administration > Utilities and convert the codes according to the numbering series you defined.