Thank you so, so much, macropod. It works! Thank you for cleaning it up, too. I went through to look at what you cleaned up; I didn't know I had too much info in the table.
Also, I changed the number format back to your suggestion, \# "$,0.00;($,0.00)" in the tax cell, D13, and it works just fine.

What a load off my shoulders! Thank you, again!

P.S. I couldn't find where I check off that this is solved, or I didn't know if you do it on your end (?)