To schedule an appointment online, visit covidtesting.tarrantcounty.com or call 817-248-6299 if you would like to schedule an appointment over the telephone, would like to cancel an existing appointment, or if you have any questions. Same-day testing is not available. Testing will be provided to participants 18 yrs. and above at no cost. Online screening is provided in English and Spanish. For Vietnamese and other languages, call 817-248-6299.. You will never exit your car. Do not roll the window down at all unless told to do so. Please have a valid photo ID with proof of Tarrant County residency. At the first station, they will identify you based on your government ID with picture. This test will go in your nose and it is uncomfortable. The swab will take 20 seconds to complete. Positive test results will be called immediately, negative test results will receive their results by mail or visit Quest Diagnostics website for results.