Your billing details should always be up to date so that the billing process runs as smoothly as possible once you make an offer.
To update your billing settings go to More > Settings > Billing details.
From this view, you will be able to update the:
Contact name of the person responsible for billing
Contact email of the person responsible for billing
Legal Entity
VAT Number
City
Province
Postal code
Country
If you need help, contact your Account Manager to support you in filling this section correctly.