How to add GST information to airtel broadband?

[mikrotik]

Appellate responded on adding GST Number on mobile asking for the registration copy. Yet to receive response for broadband.

 

[Navjot Singh]

I don't know if it's the same for a postpaid number, but I am getting the option to add GST for my prepaid no in the app.

 

[mikrotik]

I don't even see this UI