Can Turbotax still show the estimate taxes owed/refund in the top? This was available in the past at the top of the page and it would change while I was doing my taxes.

Click < or > to get the refund monitor to appear.  You might also have to toggle off that “race mode” or click Review.

Try clicking on Review on the right side.  See the screen shot on this one

Why isn't the running total of my tax due showing anymore?

I don't see the arrows you are talking about or the race mode. Can you please provide screenshots or explain where those would be? Thanks!