How to edit submitted gstr-1 and modify?

Rajesh Kumar (6 Points)

02 October 2018  

How to edit submitted GSTR-1 and modify?
I have submmited the GSTR 1 for Feb 2018 & March 2018. NOT filed. While filing GSTR 1, i realized that there were two mistake in GSTR-1 for Feb 2018 

Mistake 1 - I have added the sales figure infalted thus have to pay more GST 
GSTR 1 for Feb 2018.

Mistake 2 - I have added a invoice of April 2018 in march2018.

How can i rectify the mistakes as I am getting only filing options. Not Edit options.