T-Minus Tax Day Countdown Cost: $9 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions T-Minus Tax Day Countdown: T-Minus Tax Day Countdown Clock.. Count Down to Tax Day. How much time until April 15? Now you can count down to Tax Day! You can play our "cha-ching"! Your anticipation will build as you count down the days to when the burden will be gone.