Turn off Inventory/Inventory while creating Sales invoice

Turn off Inventory/Inventory while creating Sales invoice

I am using Zoho Books only for accouting and have a seperate billing software which contains the data of Inventory quantities, so I want to account only vendor/ customer which creating sales/ Purchase invoice without the items, is it possible to create invoice like that or create journal entry.

For ex.

Customer A/c Dr xxx

To Sales A/c xxx

without the items