You don't actually upload your DNA test results at WikiTree, but you can inform that you are DNA tested and at which firm. The information will show on the profiles of your ancestors up to your 6th grandparents and out to your 3rd cousins in order to tell other relatives that they should look for a match with you. At your profile, you choose Edit and then Edit your DNA test here. The information will be visible on the profiles after WikiTree has updated.
But you can upload your zipfile from Ancestry to Gedmatch with the opportunity to compare on which chromosome and exactly where on the chromosome you match others. If you upload to Gedmatch don't forget to inform about it at WikiTree with your Gedmatch number, so that visitors to your profile can compare directly if logged in to Gedmatch. Also don't forget to link directly to your WikiCompactTree.