@ nayab
Dear Sir, Your query could have been a little more elaborative. However, I understand that you are going to give some amount to your dealers ( I presume that you are engaged in supply of goods) for slow down of sales due to COVID-19.
Scenario 1: In this case, if the amount given is for conducting any special SALES MELA OR ANY KIND OF SALES PROMOTION ACTIVITIES BY YOUR DEALERS, then it will be treated as SUPPLY OF SERVICE PROVIDED BY YOUR DEALERS, they have to pay GST on such amount under forward charge.
Scenario 2: In this case, the amount given by you to the dealers is nothing but just a price reduction (for attractive more sale) of your goods which were supplied earlier. Then you need to raise credit note along with transfer of amount. Your dealers are required to reverse the ITC (proportionate to price reduction) and you are entitled to reduce your output tax which was already paid.
Dear Sir, if doubt still persists, you can send your query whatsapp on 6380 592 749