You can allocate payments for suppliers in the module Purchases → Allocate Payments/Credit Notes.
On this screen, you can view all unsettled documents for all or a specific supplier. To view settlements of documents in a specific period of time, use the option Supplier Allocations.
The list of transactions there are all payment documents and credit notes that haven't been allocated yet with any invoice. You can allocate payouts with suppliers' documents by clicking on the icon on the right side of a given line. After clicking on the icon for a given document, a list of unsettled invoices for this supplier will be displayed.
You can allocate payment documents with purchase documents by entering the appropriate amount in the column This Allocation and clicking the button Process.
Note:
- If there are no unsettled invoices for a given document, then after clicking the icon Allocate, the message No unsettled transactions will appear.
- Allocating payments with purchasing documents is independent of their posting; i.e. the allocation doesn't change the items in the general ledger, but only a logical mapping of payment documents to invoices.