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                   710 Points
                   Joined December 2010
                
               
			  
			  
             
            
             
	 If we check the other side, only after raising the Invoice, any Vendor discharge the output tax liability. I feel It would be erroneous, if any one take the Input Credit without a valid invoice for the Purchase  . However this may create problem to the your Vendor. As you have a valid documents for taking VAT Input Credit, Credit cannot be denied. The Principle is that once it is eligible for Input Credit by the Provisions of the ACT/RULES, there is no need  of one to one correlation of input credit with the output tax liability.