We have used Odoo 8 for the last few years with mostly operational modules (Sales, Purchases and Inventory).  We would like to move into accounting and we have the accounting modules installed.  We have used the accounting module for Invoicing and Accounts Receivable all this time as well.  We are ready to start adding the accounting accounts we dont currently have such as:

1. Employee Payroll

2. Check Generation

3. Supplier payments

4. Special expenses (Import Duties, Depreciation, Amortized Expenses, Intenal Consumption of products and such).

Which module would I need for those special expenses?