When I confirm that stocks entered the warehouse, the accounting module generates 1 entry in the stock journal (Debit Inventory 1000, Credit Payable 1000). Then when I validate the invoice, the accounting module generates another entry with tax (Debit Inventory 1000, Debit Tax Payable 100, Credit Payable 1100).

I think i must set something wrong. In product category, I have:

Stock input account: payable

Stock output account: COGs

Stock Valuation: inventory

Stock Journal: Stock journal