Sage 50 Canada

We are starting to get in chemical rebates for different products that were sold during the year - I want to post these rebates to the product that was given the rebate - what is the correct way to do this. Also when you get an early payment discount…

I have got the early payment discount to work ................. however I can only seem to apply it from the actual invoice and not from the receipts module. Is this just how it is, or can the receipts module be adjusted? I am thinking not, because…