I believe you have reported the sale of inventory as if it was an asset, so you need to reverse that entry. You will find it in the Assets/Depreciation section of your return.
Inventory is cost of goods sold property that is deducted as such against sales income. It is listed on Form 1125-A on your corporate return. Line one of that form lists the beginning inventory and line 7 lists the ending inventory. To deduct the ending inventory, you would simply leave it off the Form 1125-A on line 7 and that would result in it being added to cost of goods sold and deducted as such.
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