This page contains some hints and tips related to Settings.
1. Default accounts
Odoo has a list of default accounts in the Company Properties.
Start by enabling developer mode and navigate to Settings / Technical / Company Properties.
These are some of the Company Parameters for accounts:
2. Zero Cost
In Odoo 12 you can set an option in the System Parameters to allow zero cost. This should not be required in Odoo 13.
Start by enabling developer mode and navigate to Settings / Technical / System Parameters