Starting Your Business/Keeping Tax Records
 What are Business Expenses
Inventory
            An inventory is necessary to clearly show income when the 
              production, purchase, or sale of merchandise is an income-producing 
              factor. If you must account for an inventory in your business, you 
              must use an accrual method of accounting for your purchases and 
              sales. See Accrual 
              Method.
            To figure taxable income, you must value your 
              inventory at the beginning and end of each tax year. To determine 
              the value, you need a method for identifying the items in your inventory 
              and a method for valuing these items. See Identifying 
              Cost and Valuing 
              Inventory.
The rules for valuing inventory cannot be the same for all kinds of
businesses. The method you use must conform to generally accepted accounting principles
for similar businesses and must clearly reflect income. Your inventory practices must be
consistent from year to year.
 
Important References: 
                    
            Publication 
              538                  
              Accounting Periods and Methods
              Form 
              1040 Schedule C     Profit or Loss From Business