I presume you are concerned because the pH tends to rise fairly quickly due to the high TA level and if you also have high CH then you have a risk of scaling.
The only way to lower the TA, other than using reverse osmosis (which you can check to see if it's available in your area -- it would reduce CH as well), is to add acid and aerate the water. Use Muriatic Acid since you'll need a lot of it and it doesn't add sulfates to the water. See the procedure in this post
. It will take a lot of acid for your pool since 25-1/2 fluid ounces of full-strength Muriatic Acid (31.45% Hydrochloric Acid) in 10,000 gallons to lower the TA by 10 ppm. So with a 100,000 gallon pool, that's 2 gallons of acid to lower the TA by 10 ppm. You can add more than that amount since you can get down to a pH of 7.0 initially, as per the procedure. Just make sure to add it slowly over a return flow in the deep end with the pump running and then lightly brush the side and bottom of the pool where you added it to ensure thorough mixing.
You can use The Pool Calculator
to calculate rough dosing for lowering the pH (which also lowers the TA -- aerating the water then raises the pH without changing the TA).