The procedure of input tax credit (ITC) means deduction of the tax amount which has already been paid while acquiring the inputs for the business and paying off the difference amount while the payment of tax. With the input tax credit (ITC), the tax paid while purchasing the goods or services shall be adjusted with the tax collected at the time of sale of these goods or services by the supplier, and the difference liability between them is required to be paid.
Thus, Tax collected at the time of sale – Tax paid at the time of purchase = liability of tax to be paid.