A new corporate tax applies to corporations and banks, other than federal S-corporations, that do business in New York City. Find out what takes place in the formation of a corporation and the resulting tax responsibilities and required forms.Where to file your taxes for Form 1120-S ; A foreign country or U.S. possession. 2022 Business Corporation Tax Forms. Documents on this page are provided in pdf format. This form is for general instructions that apply to all corporation tax forms. It includes a variety of topics about how to fill out your form. You can get in-person help at your local IRS Taxpayer Assistance Center. Call for an appointment after you find a Taxpayer Assistance Center near you.