GSTR1 F.Y 19 20

Rohit Pandey (LLB PERSUING) (186 Points)

01 October 2021  
by mistake I have added same invoice in diffrent quarter having number 7 or T-7 now a days amendment not possible but my reciepnt take only one bill credit in its itc now
department generate demand of those invoic3 which was by mistakely entered in quarter

so how can I solve this pls reply