@ lakeslr73-gmail- asked: "How do i shut down my turbo tax work for today?"
You appear to be using Online TurboTax--at least that is what is indicated underneath your question. Online TurboTax automatically saves your info after each page, so you can come and go. To exit, go to the left menu column, and scroll way down near the bottom of that menu column and click on SIGN OUT.
To return to your work, sign in with the same User ID.