Sales Header Text

HI Guru's

I want to add the following Sales header text like Customer Tin No, Customer Vat No, Customer Contact No . i have created separate acess sequence for each of them.

I want to know which Text Object should i select for the above text Id's ?. Is it VBBK or KNA1 or KNVV or some other ?

Kindly help

regards

Abhijeet.