1040 Indiana frequently asked questions

Alerts and notices

New for 2018

See also: 2018 Indiana user bulletins

Frequently asked questions

General information

Allocation and apportionment (IT-40PNRA)

County tax (CT-40, CT-40PNR)

Enter a foreign address

Form IT-40RNR (Reciprocal non-resident return, County tax)

Residency status



Depreciation - Final year catch-up adjustment

Municipal (Tax-exempt) interest

Nonconformity with Internal Revenue Code

Section 179 expense

Amended Returns

Amended return (Form IT-40X)


Adoption credit

CC-40 - Credit for Contributions to Indiana Colleges and Universities

Credit for taxes paid to other states

Lake County Refundable Property Tax Credit

Nonrefundable credit - Order used and carryforward

Public School Education Expense credit

Schedule IN-529 - Education Savings Plan Credit

Schedule IN-OCC - Other Certified Credits


Civil Service Annuity deduction

Hoosier lottery winnings deduction

Long-term care policy premiums deduction

Military service deduction

Private or home school deduction

Property tax deduction

Renter's deduction

Unemployment compensation deductions

Electronic Filing

State Electronic Filing Guide

Electronic filing - Indiana forms

Electronic filing error codes

Form IN-OPT (Paper filer)

Forms included in the Electronic Record (List)

Personal Identification Number (PIN)

Withholding - Pass-through Entity (Schedule INK1)

Withholding - W-2/W-2G/1099-R/1099-MISC Detail

Withholding - W2G local withholding


Estimates for county tax

Form IT-40ES Estimate vouchers / Mailing address


Extension overview

Preparing the extension

Forms approval

Viewing forms approval status

Net Operating Loss

Net operating loss (NOL) overview

Net Operating Loss - Current Year Loss

Calculating a current year Indiana NOL

Carrying over a current year NOL

Current year NOL for part-year/nonresident

Ignoring NOL generated in current year when there is taxable income

Net Operating Loss - Deduction for Prior Year Loss

NOL deduction - Applying prior year NOL to current year income

NOL deduction - Taxpayer and spouse amounts

NOL deduction for part-year/nonresidents

Proforma prior year information to current year


Schedule IT-2210 - Farmer due date