Where do i enter VA State Tax PIN on state return (already have federal entered) on Turbo Tax Deluxe version

When you are in the Virginia interview.  You should get to a screen with the title "A few things before we wrap up your state taxes".  If you don't know where that screen is, you need to go into the "Other tax situations" section of the Virginia interview.

From there, you should see a topic titled "Virginia Identity Pin".  Click "Start" to the right of that.  On the next screen indicate that you did receive an identity PIN from Virginia, you will then be prompted for the Virginia Identity PIN

I filed my VA state tax and did not add my PIN number. The return has been accepted however no status updates on VA’s tax site.  How do I go back and add the pin once the tax return is filed and accepted?

Once your return has been filed electronically and accepted, you are not able to change the information. 

@Valemieux