Dear Sir,
I am not in the know of full facts of the practices adopted by you in both situations. Pl. ensure that no revenue loss is caused with your practices. . If revenue loss has been caused, pay tax along with interest. You can ascertain with the following illustrations.
An illustration :
(1) Suppose Principal is 'A'
Your company is 'B'
Your Dealer is 'C'
(2) Contract/agreement is absent in both scenarios. Since the condition of Section 15 (3)(b)(i) of CGST Act has not been fulfilled in both scenarios, the buyers do not know the discount at the time of supply. The buyers came to know about the discount only after the supply from A (supplier) to 'B' and from B supplier to C.
Practice of issuance of Credit Notes between both 'A' and 'B' and B and 'C' is the same. Both A and B when invoices were issued to their buyers did not record the amount of discount due to non-execution of agreement/contract. Thus both A & B while supplying goods to their buyers charged GST on the entire amount (transaction value) from their respective buyers. GST charged was NOT net of discount because the element of discount was not known at the time of supply.. Hence both the buyers i.e. B and C had initially availed ITC of the entire amount of tax paid in the original invoices.
(3) Now after supply both A & B decided to give discount to their respective buyers by way of Credit Notes. Now the question arises whether reversal of ITC attributable to the amount of discount is required or not. If required, in which situation and if not required in which situation.
Credit note can be issued with GST or without GST.
HYPOTHETICAL SITUATIONS
Scenario 1 If credit note is issued with GST :
Suppose Taxable Value : ₹ 200000/-
Tax @18% : ₹ 36000/-
Invoice Value : ₹ 2,36,000/-
Suppose Credit note is issued for ₹ 10,000/- Proportionate GST works out to ₹ 1800/-(18% of ₹ 10,000) The supplier is actually paying GST of ₹ 34200/-(36000-1800) into Govt. account after accounting for the credit note. Accordingly ITC of ₹ 1800/- (18% of ₹ 10000/-) is required to be reversed by the buyer.
Scenario 2 : If credit note is issued without GST, then no reversal of ITC is required as already explained above in my reply.
Pl. note that these are my personal views/interpretations and analysis on the issue.