Ohio city tax can get messy sometimes. Take a look at the form and instructions in the attached link for form IR-25 to see if any of the items taxable apply to you. While you may have Columbus city taxes taken out of any W-2, you may have other items that have not been appropriately taxed.
If you still have questions call the Columbus Department of Revenue.
https://www.columbus.gov/incometax/Forms/Individuals/
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
