Dear Rahmi,
The inputs labeled "federal" and "state" on the Financing and Incentive pages are for income tax and incentives offered by either the federal government or a state government. In the United States, the federal government is the national government, and state governments are governments of states (provinces) within the country.
Energy projects in the U.S. may have to pay both federal and state income taxes, and may benefit from incentives offered by both the federal and state governments.
For projects outside of the U.S., you can use the "state" inputs for taxes and incentives offered by a provincial government.
Best regards,
Paul.