jeff,
You can probably also compensate for the high TA by keeping a lower pH (depending on your calcium level) in your pool. In the long run you'll end up using about the same amount of acid as you would following the TA lowering regimen that CarlD recommends, but in smaller, more frequent doses.

It basically comes down to whether you prefer to use a bunch of acid and effort over a few days or a week to get your TA down "permanently", or test and add small doses of acid daily to keep your pH at the low end of the acceptable range (I'd be guessing at the right number without knowing your calcium level). (I put permanently in quotes because you'll eventually have to repeat the TA lowering process as your high TA make-up water raises the TA in the pool.)