First Login in GST portal.
Then Go to
Services > Ledgers > Electronic Cash Ledger > Click on File GST PMT- 09 For Transfer of Amount.
After click on “File GST PMT-09 For Transfer of Amount” you will see this form (as on 20th June 2020).
Follow the steps which is marked with Red color. Do the same.
After SAVING your details and click on Proceed to File.
You will see this final form; need to file this.
Now! Check you balance.