GEDMatch is a 3rd party tool site for autosomal DNA. It allows matching between multiple DNA testing companies. It also has tools that are not found elsewhere.
Go to the GEDMatch website. Click on the HERE in Click HERE to register.
Fill out the form to register. You do need to give your name, but you can select an alias that will be shown to other users. You also need to use a valid email address, but it can be one you set up for genealogy websites.
You will get a message about confirming your email. Open another browser window, and access your email account.
Copy the code from the email, and go back to the GEDMatch window that you left open.
Enter the code from the confirmation email, and complete registration.
You will be taken to the GEDMatch dashboard.
Section II shows how to upload an autosomal data file to your GEDMatch account.