I won't be able claim any refund as the product I sell which is shrimp has 0% gst.... I only will have too pay gst for buying and not selling. That too for very few products like machinery... Thanks for your kind reply amit
But if u sells exclusively exempted product then no gst registration . But along with exempted products, if u also sell some products on which gst is applicable then u will have to register ur self providing ur aggregate supply exceed rs 20 lakh.