Yes, you are correct. Since you live in MA you file a resident return there with all income. Since you worked in CT and never lived there, you file non-resident there and only allocate the wages earned in CT. You should work the non-resident state first (after federal entries) and take note of the income taxed and income tax applied by CT. Those numbers will be used to claim a credit on your MA resident return for taxes paid to another state. TurboTax should transfer the figures to your resident return and you should verify/edit as needed.
MD is simply the address of the employer administrative office and has no bearing on your taxes.