That's a change in accounting methods that requires filing Form 3115. Failure to do this could likely result in disallowance of the change in some subsequent year, resulting in a tax bill along with penalties and interest. Professional help in completing the form might be advisable. Mess up, and you haven't done an allowable change.
Immediately Expensing Inventory Costs _METHOD
With proper structuring of its non-tax records and method of accounting for federal tax purposes, a business can expense inventory costs in the tax year of purchase.
Here are the four requirements that must be met:
1) The business must qualify to use a small business inventory method by meeting the §448(c) gross receipts test and avoiding tax shelter status.
2) The business must use the non-AFS sec. 471(c) inventory method and the overall cash method of accounting for federal tax purposes, and the overall cash method of accounting for book purposes.
3) The business must expense its inventory costs in its bookkeeping system.
4) The business cannot allocate inventory costs to its inventory counts in any of its books and records, including, but not limited to, its bookkeeping system and point-of-sale system
