When you use auto-generated numbering with NetSuite, you can make your document number sequences independent per subsidiary.
Go to Subsidiary Record:
Setup> Company > Subsidiary > Edit
On the Document Number Prefix field provide the prefix you want to configure.
Click Save.
Enter up to 8 alphanumeric characters in this field to number transactions with a prefix to signify this subsidiary.
To set up auto-generated numbering,
go to Setup > Company > Setup Tasks > Auto-Generated Numbers.
On the Document Numbers subtab, check the Use Subsidiary box next to each transaction to which this prefix should be applied. (Example if the Document number prefix is required for invoice check the use subsidiary box corresponding to invoice.)
