ITR Filing: How to Check Your Tax Liability Before Submission for Tax Year 2026–27

Filing an Income Tax Return (ITR) is an important financial responsibility for individuals, professionals and business owners. Before submitting your return, it is essential to check your total tax liability to ensure that your income, deductions, tax payments and refund claims are reported correctly.

Calculating your tax liability in advance can help you identify any additional tax payable, avoid calculation errors and reduce the chances of receiving an income tax notice.

For Tax Year 2026–27, taxpayers should carefully review their income and applicable tax provisions before filing the corresponding return. Here is a step-by-step guide to checking your tax liability before submitting your ITR.

1. Collect All Your Income Details

The first step is to identify all sources of income earned during the relevant financial period. Do not calculate your tax only on the basis of your salary or primary business income.

Depending on your circumstances, your income may include:

• Salary and allowances

• Income from business or profession

• Interest from savings accounts and fixed deposits

• Rental income from house property

• Capital gains from shares, mutual funds or property

• Other taxable income

Review your Form 16, bank statements, AIS (Annual Information Statement), TIS (Taxpayer Information Summary) and other relevant records to check whether all income has been considered.

2. Calculate Your Total Taxable Income

Your gross income and taxable income may be different. Taxable income is calculated after considering eligible deductions, exemptions and adjustments applicable under the relevant tax regime.

A simplified calculation is:

Gross Total Income − Eligible Deductions and Adjustments = Total Taxable Income

The deductions and exemptions available depend on the applicable tax regime and the nature of your income. Do not automatically claim deductions simply because they were available in an earlier year.

For business owners and professionals, it is also important to ensure that business receipts, allowable expenses and other income have been correctly reported.

3. Compare the Old and New Tax Regimes

Eligible taxpayers should compare their tax liability under the old and new tax regimes before making a decision, wherever a choice is available.

The new tax regime is generally the default regime, but the applicable rules for choosing a regime can vary depending on whether you have business or professional income.

Tip: Calculate your tax under both regimes where permitted and compare the final tax payable after considering applicable rebates, deductions and special-rate income.

4. Check TDS and Advance Tax Already Paid

Once you estimate your gross tax liability, check the taxes already paid during the year.

These may include:

• Tax Deducted at Source (TDS)

• Tax Collected at Source (TCS), where applicable

• Advance tax payments

• Eligible self-assessment tax payments

Verify these amounts against Form 26AS, AIS, TDS certificates and your tax payment challans.

If the tax credited in your return does not match the available records, investigate the difference before submitting the ITR.

5. Calculate Your Final Tax Payable or Refund

After calculating your tax on total taxable income, subtract eligible tax credits and payments.

A simplified calculation is:

Final Tax Payable = Total Tax Liability, Including Applicable Cess and Interest − Eligible Tax Credits and Taxes Paid

If your eligible tax payments exceed your final tax liability, you may be entitled to a refund. If your tax liability exceeds the amount already paid, additional tax may be payable.

Interest under applicable provisions, such as Sections 234A, 234B and 234C where relevant, should also be considered.

Remember that a refund is subject to verification and processing by the Income Tax Department.

6. Use the Official Income Tax Calculator

The Income Tax Department's official calculator can help you estimate your tax liability using your income details and applicable tax regime.

Before using the calculator, keep the following information ready:

• Total income under different income heads

• Eligible deductions and exemptions

• Tax regime selection

• TDS and TCS details

• Advance tax and self-assessment tax payments

• Capital gains or other income taxable at special rates, where applicable

Official resource: https://www.incometax.gov.in/

Select the relevant tax calculator and assessment year or tax-year option available on the portal. Check that the calculator reflects the rules applicable to your particular return.

7. Review These Common Tax Calculation Mistakes

Before submitting your ITR, check for the following errors:

1. Missing income: Forgetting bank interest, rental income, capital gains or other taxable receipts.

2. Incorrect deductions: Claiming deductions that are not available under the selected tax regime or do not meet the applicable conditions.

3. TDS mismatch: Reporting tax credits that do not match Form 26AS or other supporting records.

4. Incorrect regime selection: Choosing a regime without comparing the resulting tax liability or checking the applicable election rules.

5. Capital gains errors: Ignoring the applicable tax rates, exemptions, reporting requirements or loss set-off rules.

6. Incorrect bank details: Providing inaccurate bank account information that may affect refund processing.

7. Incomplete verification: Forgetting to e-verify the return within the prescribed time after submission.

8. Final Checklist Before Submitting Your ITR

Use this checklist to review your return before filing:

• All income sources have been considered.

• Gross total income and taxable income have been calculated correctly.

• The applicable tax regime has been reviewed.

• Eligible deductions and exemptions have been checked.

• TDS, TCS and advance tax credits have been reconciled.

• Interest and additional tax payable have been considered.

• Bank account details and personal information are correct.

• The correct ITR form has been selected.

• Supporting documents and income records are available.

• E-verification will be completed within the prescribed time.

Conclusion

Checking your tax liability before submitting your ITR helps you file a more accurate return, identify additional tax payments and avoid common reporting mistakes. A careful review of income, deductions, tax credits and the applicable tax regime can also help you understand whether you need to pay additional tax or may be eligible for a refund.

For taxpayers with multiple income sources, capital gains, business income or complex deductions, professional assistance can help ensure that the return is prepared correctly.

Need assistance with ITR filing or tax calculation?

Connect with MyCASathi for professional tax and compliance guidance.

MyCASathi | CA Ram Kumar Gupta
Website: https://mycasathi.com
Contact: +91 99994 63001
Email: mycasathi@gmail.com

Disclaimer: This article is for general educational purposes and should not be treated as individual tax advice. Tax rates, deductions, rebates, return forms and filing requirements depend on the applicable law and the taxpayer's circumstances. Verify the relevant provisions before filing.