Setting up an account is the first and most important step as it is applicable for the different databases to make the respective transactions.
Menu Path: Admin > System Settings > Default Settings > Accounting > Enter the Account Code for each entry in Accounts /Currency/ Sundry tabs
The Accounts set here will be applicable across the database for the respective transactions made, this can be overwritten by setting the Accounting entries in the Category, Product, Customer, or Supplier Master.