Tapatalk doesn't currently have the ability to vote in polls. In order vote when using tapatalk there are 2 ways to do it

Option 1:
-While viewing thread
-press menu>web view
this will open the default web browser and navigate to the thread. If you are not logged in on the web browser you will need to log in before you vote.

Option 2:
-while viewing thread
-press menu> copy url
-open web browser of your choice
-Paste URL into the address bar

this option is if you have a prefered web browser other the default or have a web browser that you are always logged into the forum with.