How to change Microsoft Store account
To change your Microsoft Account using the Windows Store app, do the following.
Update your name or your business’s name in Windows Store
To update your name or your business’s name in Windows Store:
Change name and address for billing, shipping or taxes in Microsoft Store
To change name and address for billing, shipping or taxes:
Change the details associated with your Microsoft account in Xbox
To change the name and address associated with your Microsoft account in Xbox: If you need to change something else, select Make more changes. Hope this helps! These links may also interest you: