Cannot uncheck box 1040 pg 1 standard deduction, someone can claim: "your spouse as a dependent"

In Step by Step, 

1. Go to Personal Info
2. Select EDIT next to your wife's name.
3. You'll see her basic information - choose Continue.
4. On the screen Do Any of These Apply to (Your Wife).
5. Select None of the above.
6. Continue and close the interview.

Thanks - I tried that and it still shows the checkmark box checked when I preview a copy before e-file.

The directions from @JohnB5677 are correct to make this entry change but perhaps information from the form is stuck in the cache. You will want to follow all the way to the end of the section, to be sure it updates.

If you are using Turbo Tax Online, the most likely reason for boxes/buttons that don't work or not being able to enter information is that something in the web browser is not displaying the page or allowing it to update properly. There are directions in this TurboTax Help article to clear cache and cookies. You will want to follow those instructions, then close your browser, reload it, and log back into TurboTax. 

Another way around this is to simply use a different web browser.  You can select from Google Chrome, Mozilla Firefox, Internet Explorer or Safari.  If you need to install another browser, be sure to go to the trusted home site for the software for  security reasons.

If you are using TurboTax Desktop, try saving and closing the program and then relaunch to see if there is an update available.

Looks like I had to fix this issue by going to "Forms" view and changing the spouse worksheet.