This deduction is no longer available effective tax year 2016. However, you can still claim it on your 2015 return.
You may still claim the non-Indiana locality earnings deduction for a prior year return.
You may be allowed a deduction if you have income being taxed by a locality (local governmental unit) located in another state. A "locality" could be a city, county, parish, etc.
This deduction is limited. You may deduct the amount of your income that was taxed by a non-Indiana locality or $2,000, whichever is less. If you and your spouse both qualify, you may each claim the deduction for a maximum of $4,000.00 (limited to no more than $2,000 per person.)
You must enclose proof that the tax was paid to a locality outside Indiana to be allowed this deduction. A W-2 form is proof as long as the W-2 form shows a withholding amount and the name of the non-Indiana locality where the tax was paid. The name of the locality is usually found in box 20, Locality Name, on the W-2 form. A copy of a non-Indiana locality tax return will also serve as proof of tax paid.
For more information about this deduction, see Income Tax Information Bulletin #28.