It's really easy!
Go to "Profile", click "My details" and fill in:
- Company Name
- Company Registration Number
- Company Address
You will see this:
Click "Update user"
OR you can also click on the "Buy Credits" page https://goget.my/credits/new and you will see this:
Click on "Account detail page" and it will bring you to update your company details.
Once you do so, all your purchases will come with a tax invoice in your inbox.