You should be receiving a 2023 W-2 from the new company in Idaho with Idaho state income taxes withheld for the bonus income received in 2023.
You are going to need to file an Idaho non-resident state income tax return reporting the income and state income taxes paid.
You will also have to file a resident Ohio state income tax return reporting the income received from the Idaho company. You will get a credit on your Ohio return for the Idaho state income taxes paid.
Complete the non-resident Idaho state tax return before the Ohio resident state tax return.
