You do not upload your DNA data to WikiTree. Just go to the DNA Help pages under Help on the upper right of almost every page here. It will tell you how to enter your DNA test information which will be on your Profile Page. If you want to load your RAW Data to GedMatch and give that information also, it will help you in comparing test results from all the testing companies.
Please check HELP - DNA - FEATURES
That should help you get your DNA entered.