Buyer's VAT number stated on the Invoice

Hello Yiying, 

Thank you for reaching us on this channel.
I would request you to reach our billing team through phone or chat to know how to add VAT number. 
Visit support.avg.com/support_sales?l=en to reach our sales team.

I would like to ask how to add Buyer's VAT number stated on the Invoice?

thank you!

Hello Yiying, 

Thank you for reaching us on this channel.
I would request you to reach our billing team through phone or chat to know how to add VAT number. 
Visit support.avg.com/support_sales?l=en to reach our sales team.