Lake, I'm sorry to have to tell you that you can't search for DNA relatives on WikiTree. The information about a DNA kit (the results of a test performed by one of the testing companies) can be entered on the profile of someone who took the test. Based on the connections entered in the profile to parents and siblings (and then to their parents and siblings and children, etc.), WikiTree shows DNA relationships. So, all the DNA relationships you see in WikiTree are the result of the family connections made between profiles and are not indicative of any relationships resulting from the actual DNA tests.
To search for DNA relatives, you would have to go to the website of the company where you took the test and they would only be able to find relationships to other people who took the test from that company. You can also register your DNA test at gedmatch.com, which allows upload of DNA tests taken at a variety of test companies. That gives you a wider field of test takers to compare your results to.
