Current year and prior year registration codes can be obtained by logging into your UltimateTax Customer Portal.
After logging in, choose SOFTWARE. On the following page you will have two options: Tax Software and Add-On Products. To find your registration code, you will need to click on Go to My Tax Software.
The page may take a moment to load, but once it is done you should be able to find both a download link for each edition of your owned software, as well as a registration code associated with each.
This applies for all years.