During the final year, Offtoa computes the amount of inventory you need to maintain based on the sales you expect to have in the following year. If you indicated that your revenues are expected to decrease after the final year that Offtoa is reporting, then the inventory entries in the balance sheet for the final year will show a decrease. You can change the projected future revenue growth by clicking on settings in the menu and then changing the expected future revenue growth rate. To maintain the level of inventory through the final year, this value should be greater than or equal to zero percent.

Related Question:

How do I view/change my projected (after the years we are modeling) revenue growth rate?