Where do I find the barcode? February 27, 2020 17:21 The barcode is located on the outside of the kit packaging. It is also located on the collection device. Related articles What should I do if I sent my kit to the lab before registering it? How do I register my kit? How do I track my kit? How long does it take to get COVID-19 test results back? Who is eligible to obtain the COVID-19 at-home kit?