How to apply the supplier Deposit to the Final Bill

To apply the supplier deposit to the final bill in Odoo, you can record the deposit paid as a debit note then apply it to the final bill by entering a negative purchase. Alternatively, you can create an advance payment on purchase orders

1. Go to the relevant Purchase Order then click CREATE BILL. 
2. It will then direct you to a draft bill where you can edit the details such as the Bill Date. Once done,  you can click on CONFIRM and APPROVE.
   
   
   
3. Once confirmed, you will see the Supplier Deposit that you created then click on "Add". After adding the deposit, it will then be applied to your bill accordingly.

4.  Once we add the deposit amount to the bill, the negative amount in the Aged Payable report that we saw while we were creating the deposit will now be removed, and you will see the bill instead with the deposit amount deducted.