This activity is used to enter, modify, and view specific number series used for each customer and supplier tax invoice series. It is only possible to enter a tax number series if the Separate Tax Invoice option is enabled for the particular invoice series.
A number series is defined in three ways:
The Use Tax Invoice attribute must have been selected for the company
and Separate Tax Invoice must have been selected for the invoice series.
Depending on the activity, the tax invoice number series will be automatically assigned to the invoices or you can enter them manually.