Baking Soda raises TA. It can also raise the pH a little bit, but that depends somewhat on how you add the baking soda. If you add it too quickly, such that you see some bubbling on the surface, then you can end up outgassing carbon dioxide which raises the pH. If you instead add it slowly over a return flow with the pump running or you distribute it around the pool more evenly, then the pH won't rise as much. This effect is far more noticeable in a spa than in a pool, however.