Some people have taken TA down to the 50 to 60 range without problems. Just how far down you can go depends on your CYA level. If you post a full set of test results we should be able to suggest an approach to stabilizing your TA and PH.
OK full set of numbers as of last Sunday:
Two weeks ago the TA was 60, I added 1 lb of baking soda. A week ago the TA was still 60, I added 3 lbs of baking soda. Sunday I added another 2 lbs. This pool has always had a very high acid demand. I am adding about 32 oz of 32% acid per week. I have recently installed a metering pump to automatically feed acid into the pool. The pool was finished in October of last year so is about 8 months old.