The entry is not added to the product stock

I have inventory app with 4 tables
products
sell (subtracts a specified number of products in stock)
purchase (adds a specified number of products in stock)
and
returns (adds a specified number of products in stock) -this one doesn’t work
every time when I add new item as a return there is entry in my google sheets and in “related returns” section on the specific product page.
problem is that current stock do not change at all. how to fix that?
I see that products section “can have many” sales and purchases and returns “has many”.

Hi @Filip_Kosciuk
How do you calculate current stock?

what do you mean? Returns tab should be exactly the same as Purchases tab. Those 2 tabs are able to only add items to current stock.