How to modify the numeration

If you wish to change the numeration of invoices, quotes, orders, and projects, just enter the desired value in the number box.

The number of the new document is generated according to the settings in Settings > Sales and finance > General. 

When selecting By last number, the system will add 1 to the number of the document that was created last.

By largest number will trigger the system to find the largest existing document number (which may not be the last since the numbers can be edited) and add 1 to create the new sequence number.

Example.

The setting of using the largest invoice number +1 is activated.
If you wish to start numbering invoices from 17001, type it in. The next invoice created will be 17002.

To change the numbering of invoices at the beginning of a new year, create a new document and type in the number you'd like to start the year with. E.g. at the beginning of 2018 the number could be 2018001. The next invoice created will have the number 2018002 and so on.

There's also a possibility to add a project number in front of the quote number. You can activate the feature under Settings > Sales and finance > Quotes.

If you wish to display the invoice issuer ID in front of the invoice number, tick the box under Settings > Sales and finance > Invoices/Expenses. Then go to Settings > Users & Groups, click on the name of the user and set an invoice issuer ID number.