Expired Product and Turbo Tax Cost of Goods sold calculation

I had some products go bad close to a grand of it... i understand that from my books point of view, that's simply a debit or increase in my cost of goods sold and a credit or decrease to my inventory. But how do I enter that into Turbo Tax? the calculation is beginning inventory plus purchases minus ending inventory is cost of goods sold. isn't there a way to further explain the rise in cost of goods sold?