I am a non resident of North Carolina since I stayed in NC for 3 months during my internship. I am a resident of Ames.
1. Which forms should I fill for NC ?
2. Should I claim refund in NC ?
3. Should I fill form 1040A ( Iowa state tax ) form and claim refund here ?
4. Even if I am not claiming refund in NC should I still file a return ?

Regards,
Utkarsh

Utkarsh:

You will file as a non-resident of North Carolina, but pay taxes as required by NC. You will probably get some type of refund.

When you file as a full-year resident of Iowa, you claim a credit for the NC taxes you paid to NC state on your Iowa return. You should attach a copy of the NC non-resident tax return to the Iowa return if you mail it in.

I cannot say which forms need to be filed, but any competent tax preparer will be able to file these returns with little problem.

I understand I have to fill 1040A short form , but should I add the sum of both w2 and write or is there any other way to fill this form ?

If you have two W2's, add them together and enter the total on your 1040. Don't forget to do the same when reporting taxes withheld by your employers.