State tax filing

I understand that NY considers the total income to set the tax bracket, but I don't understand what turbotax is asking, how the form is filled out and how to check the tax calculated is OK.

1. It is confusing that turbotax asks me for 28% and then nothing happens - shouldn't this be called out somewhere on the screen?

2. What is turbotax doing with the 28%? does it go in any form? which form and line?

3. Where does the dollar value for 28% go? which form and line?

4. Otherwise, how is the NY portion of the income calculated? what form/line?

Thanks!