How to add surnames to your FTDNA account
First) Print out a standard pedigree sheet or report from your current software or just fill in a paper pedigree sheet. This will show your direct ancestors starting with the person who tested.
Second) Log onto your FTDNA account using this link below
On the upper right corner in blue letters is the Name of the tester and Kit number below it.
Hover your mouse over this name and you will see My Profile
Click on My Profile
You will be on a page that says Account Information
Click on Genealogy
You will be on a screen that says Genealogy
Click on Surnames
On the right of the screen you will see Add a New Surname. You then add each of your surnames from your pedigree sheet and then click the SAVE button. The program will automatically sort your surnames alphabetically.