If you want specific people to access the Accounting module, you can do so under Users & Roles > Roles & Permissions. Under the Accounting section, you can choose whether the users assigned to the selected role can have access to the following:
- View the Accounting module in read-only mode;
- Manage Accounting with full access;
- Reports access;
- Print Checks access;
- Reconciliation tab access.
If you want to grant someone access to Accounting and not to People data, make sure to check View/Manage under Accounting and uncheck View under People.