Kimberly, On WikiTree you don't actually enter your DNA data--you enter the information about which DNA tests you've taken. On the profile for the person who took the DNA test, 'hover' your cursor over the word 'Add' at the top right of the page, and select 'DNA Test Information'. That will take you to a page where you can indicate which DNA tests were taken. The information will appear on the profiles of the relatives of the person tested a day later.
Be sure to set the privacy level on the profile as 'Private with Public Family Tree' or less restrictive.