HI Dorothy,
What is it you need help with? WikiTree does not store your DNA, so you cannot upload it, you can however add details of which company you tested with and add the test details to WT. To do this go to your profile click family tree and tools tab, scroll down to DNA ancestors confirmation aid, from there click the DNA tests tab, then add new test information. Select which test you took from the drop down box add your information and if you have uploaded your DNA to Gedmatch you can add your Gedmatch kit number so that other WT users can compare test kits. It will take around 24 hours after adding the test details for WT to update and add your DNA test details to your ancestors profiles here on WT