If you are using Tasker how I think you are, then you’re using the Beeminder app’s timer and that does count in hours. If you are using a timer within Tasker I don’t know the details.
If you are willing to switch the goal from minutes to hours, you can do so via the bottom-most option on Terrifyingly Advanced settings (multiply all the data points by 1/60.)
Personally I wish all the time-tracking goals were in seconds so we could use integery on them but that’s another can of worms.