A business investment loss is a special type of capital loss and can occur, for example,
            when you dispose of shares or certain debts of a small business corporation. The
            allowable (deductible) portion of the loss is listed on line 21700.
        
         
        
        
        To review and confirm your business investment loss on line 21700: 
                - Select X in the upper-right corner to close the Help window.
 
                - In the upper-right corner of your screen, select Find.
 
                - In the Find window, type Allowable.
 
                - Select Allowable Business Investment Losses  from the list, and select
                        Go.