Are multiple W2s from different employers in the same state added under 1 Federal and State return, or do I need to file multiple federal and state returns for each W2?

I have 4 different W2s from 4 different businesses, all in the State of Delaware. Do I file one return for Federal and one for State, or does each W2 require its own federal and state return with Turbo tax? Also, what is the State fee(s) for the numerous returns that I have, again all in the same state?