I found the tried and true salt/baking soda/water not only helped mouth but helped cut phlem some.

Tongue is variable -- depends on whether they did Boost treatments directly at the tumor, how many, etc. If my experience is any guide, a couple of weeks and you should see some improvement.

Taste is more variable. A little bit will start coming back soon, but does so slowly. I reached a point about 3 months out where I thought I had gotten back all of the taste I was going to, but then it continued to improve. Today, 15 months out, I would say I have 95% of my taste back.

Tough to do, but be patient. It all comes back in time, and if you expect too much, too soon, you will inevitably be disappointed and depressed\angry. Take it one day at a time, and celebrate the improvements.

Good luck and keep posting!