Can't disable Dell touchpad tapping

When I type, my palms move the cursor and mess up my typing.

I'm not sure what the problem is. I've tried enabling Palm Rejection reducing touchpad sensitivity, and reducing touchpad speed, none of which solved my problem while typing.

I then decided to disable the tap to click feature. I unchecked the box in the dell touchpad settings and clicked save, but it didn't do anything. The touchpad still clicks when tapped.

I recently updated my drivers to fix a different touchpad issue, so I'm not sure what to do at this point. I only got the computer a month ago, but I can't use it like this. Any help is greatly appreciated.