In 2018, over 85% of Indiana taxpayers filed their tax returns electronically, receiving refunds in as little as 10 to 14 days compared to up to 12 weeks for paper filings. For the 2019 tax year, that time difference could mean having extra money available when you need it most. Filing your Indiana tax return is more than a legal requirement. It is a way to protect your income, avoid costly penalties, and secure your earned deductions and credits.

Whether you are an individual taxpayer, a sole proprietor, or a small business owner, knowing how to file your Indiana tax return correctly will save you time and stress. This guide breaks the process into simple steps, from determining if you must file to choosing the proper Indiana state tax forms. You will also find precise instructions for preparing documents, deciding between e-filing and paper filing, making payments, and tracking your refund. The goal is to simplify the filing process confidently and without last-minute scrambling.

Every section of this article is based on official Indiana Department of Revenue guidance, so you can be sure the information is accurate and current for the 2019 tax year. These steps can reduce errors, speed processing, and ensure your return is complete. The sooner you file, the faster your refund will arrive, and the less you risk missing out on money that belongs to you. If you are ready to take control of your tax filing, start gathering your documents now and follow this guide through each stage.

Who Needs to File a 2019 Indiana Tax Return

Not everyone living or earning in Indiana must file a 2019 tax return, but knowing the rules is essential to avoid penalties or missing out on a refund you are entitled to. The Indiana Department of Revenue sets filing requirements based on residency status, income, and exemption amounts.

  1. Full-Year Indiana Residents must file Form IT-40 if their gross income exceeds their total exemptions. In 2019, Indiana allowed a $1,000 exemption for you, $1,000 for your spouse if married filing jointly, and $1,000 for each dependent. For example, a married couple with two children would have $4,000 in exemptions. If your gross income exceeds that amount, you are required to file. Even if your income is below the threshold, filing may still be worthwhile if you had taxes withheld or qualify for refundable credits, as this could result in a refund.
  2. Part-Year Residents and Nonresidents who earned income from Indiana sources must file Form IT-40PNR. This applies if you moved into or out of the state during the year or lived elsewhere but earned money from Indiana-based work, rental property, or other taxable sources.
  3. Reciprocal State Residents from Kentucky, Michigan, Ohio, Pennsylvania, or Wisconsin are generally not required to pay Indiana tax on wages, salaries, tips, or commissions earned in the state, provided they file Form IT-40RNR. However, if you had other Indiana-sourced income beyond wages, you must file the appropriate return and pay Indiana income tax.

The bottom line is simple: if you lived in Indiana for any part of 2019 or earned income from Indiana sources, you should review the filing requirements carefully. Filing when required protects you from penalties, while filing when you are not required but had taxes withheld can put money back in your pocket. Before moving forward, determine your residency status, review your income, and check the applicable form instructions to see if you are required or eligible to file.

Important 2019 Filing Deadlines and Changes

Meeting the correct filing deadline is one of the simplest ways to avoid unnecessary costs. For the 2019 tax year:

  • Original filing deadline: April 15, 2020.
  • Filing after this date without an approved extension could result in:
    • Failure-to-file penalty of 10% of the unpaid tax.
    • Failure-to-pay penalty of 5% per month, up to 25%.
    • Interest charges from the original due date until the balance is paid.

If you cannot file by April 15, request extra time using Form IT-9 or file for a federal extension. Both options gave you until November 14, 2020, to submit your return. Remember, an extension to the file is not an extension to pay. Any unpaid balance after April 15 still accrues penalties and interest.

Key 2019 Tax Law Changes:

  • School Scholarship Tax Credit contribution ceiling increased to $15 million.
  • Headquarters Relocation Credit became refundable.
  • Continued phase-out of tax on military retirement income.
  • Schedule IN-529R replaced the new credit recapture schedule (Schedule IN-CR).
  • Updated bonus depreciation and Section 179 expense add-back rules.

Reviewing these changes before filing can help you claim all eligible credits and avoid mistakes that slow down your refund or increase your tax bill.

Understanding Indiana State Tax Forms

The form you use depends on your residency status and income sources. Form IT-40 is for full-year residents who lived in Indiana for all of 2019 and meet the filing requirements. Form IT-40PNR is for part-year residents or nonresidents with Indiana-source income. Form IT-40RNR applies to Kentucky, Michigan, Ohio, Pennsylvania, or Wisconsin residents who earned only Indiana wages under reciprocal agreements.

Required Schedules

Most taxpayers must attach Schedule 3 to report exemptions and Schedule 7 to provide additional information. Schedule CT-40 is also required to calculate county tax, based on your county of residence and workplace as of January 1, 2019.

Additional Schedules

Depending on your situation, you may need:

  • Schedule 1 for add-backs to federal income, such as bonus depreciation differences or state and local tax deductions.
  • Schedule 2 for deductions like Social Security benefits or military retirement income.
  • Schedule 5 for credits and donations.
  • Schedule 6 for offset credits.
  • Schedule IN-DEP for dependent information.

Special Credit and Deduction Forms

Certain taxpayers may also need:

  • CC-40 to claim the Indiana College Credit.
  • IN-EIC for the Indiana Earned Income Credit.
  • IN-529 for CollegeChoice 529 Plan contributions.
  • IT-9 to request an extension to file.

Why Federal Return Information Matters

Indiana tax forms rely on data from your federal return, especially your Federal Adjusted Gross Income (AGI). Complete your federal Form 1040 or 1040SR before starting your state return. This step ensures accuracy and prevents mismatched numbers, which commonly cause delays in processing.

Step-by-Step: How to File Your Indiana Tax Return

Filing your 2019 Indiana tax return is easier when you break it into clear steps. Following the process in order helps prevent errors, delays, and missed opportunities for deductions or credits.

1. Gather All Required Documents

Before you start, make sure you have:

  • W-2 forms from all employers.
  • 1099 forms for interest, dividends, retirement distributions, or unemployment compensation.
  • IN K-1 forms showing Indiana withholding.
  • A completed federal tax return (Form 1040 or 1040SR).
  • Records of estimated tax payments.
  • Receipts or proof for deductions and credits.
  • The previous year’s Indiana tax return for reference.

2. Choose Your Filing Status

Your Indiana filing status must match your federal filing status.

  • Married filing jointly federally means filing in Indiana.
  • Married filing separately federally means filing in Indiana.
  • Include both Social Security numbers for joint or separate returns.

3. Complete the Main Form

For most full-year residents, this will be Form IT-40. Follow the form line-by-line:

  • Line 1 Federal Adjusted Gross Income (AGI): Enter the amount from your federal return.
  • Line 2 Add-Backs: Complete Schedule 1 if applicable.
  • Line 4  Deductions: Use Schedule 2 to claim eligible deductions such as Social Security benefits or military retirement income.
  • Line 6 Exemptions: Complete Schedule 3 to claim $1,000 for yourself, $1,000 for your spouse, and $1,000 per dependent.
  • Line 9 County Tax: Complete Schedule CT-40 using your January 1, 2019, county codes.
  • Line 12 Credits: Complete Schedule 5 to report Indiana withholding, estimated payments, and other credits.

4. Attach Required Schedules and Forms

Include Schedules 3, 7, and CT-40 at a minimum. Add other schedules or credit forms as needed. Arrange them in numerical order behind the main form.

5. Avoid Common Mistakes

  • Double-check that your AGI matches your federal return.
  • Use January 1, 2019, addresses for county codes.
  • Round all amounts to whole dollars.
  • Ensure Social Security numbers are correct.
  • Sign the return; both spouses must sign if filing jointly.

6. Decide How You Will File

You can e-file for faster processing and fewer errors or file a paper return by mail. The following section explains the pros and cons of each method. Working through each step carefully and in order will reduce the risk of delays, penalties, and missed refunds.

Filing Methods: E-File vs Paper Filing

How you submit your 2019 Indiana tax return can affect how quickly your refund arrives and how likely you are to make mistakes.

E-Filing (Recommended)

E-filing is the fastest and most accurate way to file your Indiana taxes. According to the Indiana Department of Revenue, more than 85% of taxpayers filed electronically in 2018, and most received their refunds within 10 to 14 days.

Benefits of E-Filing:

  • Faster refunds compared to paper returns.
  • Lower error rate—about 98% accuracy compared to 80% for paper returns.
  • Immediate confirmation that your return was received.
  • Convenient payment and refund deposit options.

How to E-File:

  • Use the INfreefile program if you qualify for free filing.
  • Access commercial tax preparation software or authorized e-file providers.
  • Have your federal return completed first to ensure accuracy.

Paper Filing

Paper filing may be necessary for those who prefer or are required to submit physical documents. Refunds for paper returns typically take 10 to 12 weeks.

Steps for Paper Filing:

  • Print the correct form and all required schedules.
  • Use black or blue ink and print clearly.
  • Do not staple or paper-clip your documents.
  • Include all W-2s and 1099s showing Indiana withholding.
  • Arrange schedules in numerical order behind the main form.

Mailing Addresses:

  • With Payment: Indiana Department of Revenue, P.O. Box 7224, Indianapolis, IN 46207-7224.
  • Without Payment or Refund Due: Indiana Department of Revenue, P.O. Box 40, Indianapolis, IN 46206-0040.

Choosing e-file whenever possible will save you time, reduce stress, and get your refund sooner.

How to Pay Your Indiana State Taxes

Once you complete your 2019 Indiana tax return, the next step is to report and pay any balance due. Paying on time will help you avoid interest and penalties.

1. Pay Taxes Online

The INTIME portal on the Indiana Department of Revenue’s website is the fastest way to pay. You can pay taxes online by:

  • Electronic check (ACH): Low cost—only a $1 fee.
  • Credit or debit card: Convenience fee applies, but it is often worth it for speed and flexibility.
  • Scheduling payments in advance to align with your budget.

This method is secure and recommended for most taxpayers. If you have completed your federal IRS return first, you will have the information you need to pay your state taxes accurately.

2. Mail a Check or Money Order

If you prefer mailing your payment:

  • Make it payable to the Indiana Department of Revenue.
  • Include the correct payment voucher from your form packet.
  • Mail to the “with payment” address listed in the instructions.

3. Payment Plans

You may be eligible for a payment plan through the INTIME portal if you cannot pay the full amount. Keep in mind:

  • Interest continues to accrue until the balance is paid in full.
  • Late payments can lead to collection actions.

Choosing the correct payment method depends on your preferences, budget, and timing. Paying electronically is generally faster, reduces human error, and helps you keep better records for future filings.

How to Track Your Refund

After filing your 2019 Indiana tax return, your refund will arrive faster if you e-file and choose direct deposit. The Indiana Department of Revenue offers several ways to check your refund status so you know exactly when to expect your payment.

1. Online Tracking

Use the INTIME portal at the Indiana Department of Revenue website to track your refund status. You will need your Social Security number and the exact refund amount from your return. This is the quickest way to get updates.

2. Automated Phone System

Call (317) 233-4018 for 24/7 automated updates. Have your Social Security number and refund amount ready before you call.

3. Customer Service Assistance

Call (317) 232-2240 during business hours if you need additional help or if your refund is delayed. Representatives can review your account and explain any issues.

Processing Times:

  • E-file with direct deposit: 10 to 14 days.
  • Paper filing: 10 to 12 weeks.

If your refund is smaller than expected, part of it may have been applied to debts such as unpaid insurance premiums owed to a state agency, child support, student loans, or past-due taxes. You will receive a notice explaining any reductions.

Final Filing Checklist

Review this checklist before sending your 2019 Indiana tax return to ensure nothing is missing. Skipping even one step can cause delays or rejected filings.

  • The correct form was completed based on your residency status.
  • The required schedules are attached (at minimum: Schedules 3, 7, and CT-40).
  • All Social Security numbers were entered accurately.
  • All W-2s, 1099s, and other income statements are included.
  • All deductions and credits are correctly documented.
  • Payment method chosen and, if applicable, voucher included.
  • The correct mailing address is used if filing by paper.
  • Signatures included (both spouses if filing jointly).
  • Copies saved for your records.
  • Figures match your federal return exactly where required.

A final review only takes a few minutes and can prevent weeks of delay in processing your refund.

Frequently Asked Questions (FAQs)

Do I need to file an Indiana income tax return if I only had Social Security income in 2019?

If Social Security were your only income, you generally would not need to file an Indiana income tax return because the state does not tax these benefits. However, if you had taxes withheld from another source or want to claim credits for dependents, you may still want to prepare and file for a refund.

What happens if I file my Indiana income tax return late?

Filing your Indiana income tax return late can lead to a 10% failure-to-file penalty, plus a 5% monthly penalty for any unpaid tax. Interest is also charged from the original due date. Even if you cannot pay the full amount, preparing and filing promptly to reduce penalties and protect refunds for you and your dependents is better.

Can I amend my Indiana income tax return if I forgot to claim deductions for dependents?

Yes, you can amend your Indiana income tax return using Form IT-40X. Include updated information about dependents and proof of eligibility. Preparing an amended return quickly is essential because you generally have a three-year window from the original filing date to claim additional deductions or credits. This can increase your refund or reduce taxes owed.

How should I prepare my Indiana income tax return if I moved during the year?

If you moved in or out of Indiana during 2019, you will likely need to file Form IT-40PNR for part-year residents. Gather documents for both periods, including income earned inside and outside Indiana. Preparing your return carefully ensures you claim the proper exemptions for yourself and your dependents while reporting income accurately for each residency period.

How can I make sure my Indiana income tax refund arrives quickly?

E-file your Indiana income tax return and choose direct deposit to speed up your refund. Prepare your documents early, double-check your dependents’ information, and verify Social Security numbers. Filing online reduces human error, which is a common cause of delays. Most electronic refunds arrive in 10 to 14 days, compared to 10 to 12 weeks for paper returns.