When there are changes to your income, exemptions, deductions or credits. This may result in a refund or additional tax due.
If you haven't yet filed your state tax return, but you filed a federal amended tax return (1040X), then just file your regular state tax return using the updated information.
If you have already filed your state tax return, you'll need to file an amended (corrected) return using Form IT40X.
If you have additional questions about your specific circumstances, please contact the Department.