Yes, these expenses can be entered in TurboTax Online. If this is a side business, you will complete a Schedule C. In the self-employment income section is where to report this. Cost of Goods Sold is computed by the change in your inventory, plus related expenses. Go to : Federal > Wages & Income > Self-employment income and expenses Then, choose or add your business. Next, add an expense, navigate to "less common expense" and choose "Inventory."