Mistake in GSTR 1

No need to worry. You can update in the next month return.

you can rectify the wrong bills by amendments in gstr1.

@ vinod sir plz give the process how to amendment

In GSTR 1 , there is amendment table .choose the necessary table and make amendments.

1)how to exact reconcile GST 2A ? i have download Excel sheet from GST portal but tell me short cut for that... 

2)In case recipient not file there GST 1 after follow up mail and all then what should I do ?? I have one option to stop the payment but in case I have done advance payment then what should I do ??