How to change company details including address and postal address? Make sure you are on the Account page. Here you can make changes to the company details. Here you can make changes to the address. Use the drop down to select whether your postal address is the same as the address above. Here you can make changes to the postal address.NOTE - This is only visible if you select 'Use A different Postal Address' in previous step. Click SAVE CHANGES to make the changes.