Dear Sir,
KKC is not applicable on the above circumstances if the invoices and service provided before the change of rate of tax according to Rule 4 of Point of Taxation Rules
Determination of point of taxation in case of change of rate of tax.-
Notwithstanding anything contained in rule 3, the point of taxation in cases where there is a 1[change in effective rate of tax] in respect of a service, shall be determined in the following manner, namely:-
(a) in case a taxable service has been provided before the change of rate,-
(i) where the invoice for the same has been issued and the payment received after the 3[change in effective rate of tax], the point of taxation shall be date of payment or issuing of invoice, whichever is earlier; or
(ii) where the invoice has also been issued prior to 2[change in effective rate of tax] but the payment is received after the 3[change in effective rate of tax], the point of taxation shall be the date of issuing of invoice; or
(iii) where the payment is also received before the 3[change in effective rate of tax], but the invoice for the same has been issued after the 3[change in effective rate of tax], the point of taxation shall be the date of payment;
(b) in case a taxable service has been provided after the 3[change in effective rate of tax],-
(i) where the payment for the invoice is also made after the 1[change in effective rate of tax] but the invoice has been issued prior to the 1[change in effective rate of tax], the point of taxation shall be the date of payment; or
(ii) where the invoice has been issued and the payment for the invoice received before the 1[change in effective rate of tax], the point of taxation shall be the date of receipt of payment or date of issuance of invoice, whichever is earlier; or
(iii) where the invoice has also been raised after the 3[change in effective rate of tax], but the payment has been received before the 3[change in effective rate of tax],, the point of taxation shall be date of issuing of invoice.