i have GSTR1 Submit for Dece 2017 . for B2C only. there are 3 invoices but my mistakly submit only 1st invoice , now pendint next 2 invoices. what i do. or .can i will be pay heave panelty like Rs 200 per day or liabilty only. and i have submit GSTR3B all return. please sujest me.