As per GST Act, we have to mention all record kept i.e. Challon Number in GSTR1.
In our case we have not mentioned any challon number under Material supply under warranty , Inter Unit Transfer, Returnable Goods in particular month.
Since our GSTR1 for Mar-18 is due can we mention altogether challon number i.e. (July-17 to Mar-18) in Month of Mar-18.
TaxTMI 
