It sounds like you might be missing a copy of your W-2 with the Massachusetts information on it. You will need to contact your employer to provide the information you need to complete your Massachusetts return.
Usually, the information on the TOTAL STATE copy is the sum of all of the states being reported, so if you subtract the CT amount from the TOTAL STATE amount you should be able to back into your MA amount assuming there are no other states being reported. However, you'll need your employer's state TIN in order to complete the return.
@Jiselle25
