W2 Box 14. If the Description refer to stocks (RSU, SAR), what is the appropriate "Category" to select on the turbo tax form?

Employers can put just about anything in box 14; it's a catch-all for items that don't have their own dedicated box on the W-2.

If none of the categories apply, scroll to the bottom of the list and choose Other–not on above list. Don’t worry. We'll figure out if it impacts your return or not. If we need more information, we'll ask you.

There is no other to select....

"Other" is at the very bottom of the "Category" list.  Please see example image below.