Hi Steve,
You can't actually upload your DNA results to WikiTree. But you can add to your profile the fact that you've taken a particular test (which it appears that you have done). This link should get you to your DNA tests where you can add/modify your test info.
The fact that you've taken a particular test will propagate to the appropriate existing ancestors/descendants (which differ based on the type of test taken) within 24 hours. If new ancestors are added and/or relationships are changed, the DNA test info will propagate/repropagate within 24 hours to the appropriate new/updated profiles.
For autosomal/auDNA tests from most testing companies, you can actually upload your results at GEDmatch/Genesis for matching with others that have also uploaded there.