Do I need add my 1042-S(No tax withheld and no withholding credit) form to 1040? Do I need form 8843?

[act-go-attck]

J1 research scholar since Oct 2016.

[KarenJ]

Yes, you need to add any income from your 1042-S to your resident return.  As you are a US resident, you need to work with your financial institutions to complete a Form W-9 to advise them that you are now a US resident and should be receiving Form 1099 and not Form 1042-S.