Date of receipt of Payment in case of change in rate of tax :
Normally the date of receipt of payment is the date of credit in the bank account of the recipient of payment or the date on which the payment is entered into his books of account, whichever is earlier. Further, the date of credit in the bank account is relevant if such credit is after four working days from the date of change in rate of tax.
The way of calculation of time of supply is adequately covered by the provisions of Sections 12, 13 and 14, one has to keep in mind these provisions and calculate time of supply which is the pivot to determine when the liability to discharge tax will arise.