Refund against demand

I received a demand based on GSTR9 annual return for 2017-18, 2018-19 & 2019-20 in this regard i have done my complete workings based on my my workings it is showing refund from GST department, major difference is ITC claimed (Vs) ITC as per 2A, actually at the of GSTR9 filing auto populated ITC as per 2A is less compared to present ITC as per 2A for the above said periods, is it possible to receive the refund from GST department? kindly help me in this regard 🙏