Revised GSTR-3B.

Dear friends

I have filed GSTR-3B for the month of JUNE 2018 with taxable value Rs. 2,58,900.

But I had just known that my taxable value in respect of JUNE 2018 is Rs. 3,08,650.

Now I would like to file GSTR-1.The aggregate taxable amount o f All invoices in the month of JUNE 2018 is Rs. 3,08,650.
Now I would like to enter In GSTR-1with correct amount.i.e Rs. 3,08,650.

Can I revise my GSTR-3B for the month of JUNE 2018 with corrected taxable value before or after filing of GSTR-1?

If yes, Please let me know the procedure ?