从堆栈中的View Controller切换到不在堆栈上的View Controller

I'm hoping you can help me out. I've designed an app that is a Tab Bar app. In the view controller for the first tab, there is a button, that when pressed, generates a modal view. I've initialized a nav controller on that modal view, because when I hit the "Save" button on my modal view (which I use to input user data), I push another table view (which shows a table of all user inputted data so far). On that stacked table view, I have a "Done" button, which when pressed, should go to another view on the tab (a progress view of user input), that is, OFF the stack. I'm hoping you can help me out. I've designed a