Get your taxes done using TurboTax

If all of the information is the same on the federal totals, Employer Identification Number, etc., you can just add the lines for the state portion. 

Just make sure the total of all the state lines equal the total of the federal wages to ensure you are reporting all of the W-2 income.  You will see the input on your W-2 section under boxes 15-17.  You can add the rows for each additional state as needed here.