Received an Income Tax Notice? Here Are 8 Sections Every Taxpayer Should Know

Generic user silhouette icon Anupama VM - 0 min read

Last Updated: 26th August 2026 - 12:08 pm

Receiving an Income Tax notice could be unsettling, particularly when you are not aware of the reason behind this correspondence. Nonetheless, being served with a notice does not imply that you have evaded tax or made a grave error with your ITR.

The Income Tax Department sends notices for various reasons. In some cases, it may ask you to explain a mismatch in your return. At other times, it may seek additional documents or information. Certain notices can also start a detailed assessment, rectification or reassessment process.

The first step, therefore, is not to panic. Instead, read the notice carefully and check the section under which it has been issued. The section usually gives you a clear indication of what the department wants from you.

Here are eight important Income Tax sections that taxpayers should know.

1. Section 143(1)(a): Proposed Adjustment in Your ITR

A notice under Section 143(1)(a) is generally issued when the Income Tax Department identifies a possible adjustment while processing your ITR.

For example, the department may find that a deduction claimed in your return does not appear to match the information available with it. There could also be a difference between the income, tax credit or deduction reported in your ITR and the information available in its records.

This notice will provide you the chance to reply regarding this proposed adjustment. You need to verify the information mentioned in the notice against your ITR.

In case your original declaration is right, then you can provide the relevant explanation within the prescribed period of time.

2. Section 139(9): Defective Income Tax Return

If a taxpayer receives a notice from the Income Tax Department as per Section 139(9), it is considered that the return is defective in their opinion.

It does not always imply that one has hidden any income. It may relate to a minor detail that is either missing from the return or incorrectly entered.

The notice specifies the defect that needs to be addressed by the taxpayer. Therefore, one needs to look into it carefully and submit a reply/return in time.

Not doing so will give rise to further problems. Therefore, it is important for taxpayers to be aware of the defect that needs correction.

3. Section 142(1): Provision of Information or Documents

Section 142(1) notice is a notice that will be issued where the department needs further information, document, or explanation from the taxpayer.

In most cases, the notice may request you to provide particular information regarding your income, deductions, investments, expenses, or any other information stated in the Income Tax Return (ITR). There are also instances where it may require a taxpayer to give a return of income.

It is important to pay attention to such a notice since the department has specifically asked you for information that will be used in the assessment.

The best way forward is to answer each question in the notice and provide the necessary documents.

4. Section 143(2): Scrutiny of Your Income Tax Return

A notice under Section 143(2) is commonly associated with scrutiny assessment.

In simple terms, it means that your return has been selected for a more detailed examination by the Income Tax Department. The department may examine specific claims, income details, deductions or other information reported in your return.

Receiving a scrutiny notice does not by itself establish that you have committed tax evasion. It means the department wants to examine the return in greater detail.

If you receive such a notice, check the issues mentioned carefully. Keep your ITR, bank statements, investment records, Form 26AS, Annual Information Statement (AIS), Taxpayer Information Summary (TIS) and other relevant documents ready.
For complex cases, seeking professional tax advice can also help you respond correctly.

5. Section 148: Reassessment of Income

Section 148 is related to reassessment where the Income Tax Department has information which indicates that the income chargeable to tax has evaded assessment.

This is more serious than a simple demand for further information. The department has information that was not fully taken into account when the initial assessment was made.

But it does not mean that just because there is a Section 148 notice, it means that the income has been found to be undisclosed. The notice along with the proceeding needs to be examined carefully.

It is important to know what information the reassessment has been made upon and take necessary action within the prescribed time frame.

6. Section 245: Adjustment of Refund Against Tax Demand

Section 154 addresses rectification of an apparent mistake.

This section may apply in cases of mistakes in an order or record which are capable of being rectified without a new evaluation of the whole case.

There may also be an apparent mistake in tax calculation or in the tax credit.

The taxpayers may also apply for rectification wherever required. The essential thing is to specify the mistake and furnish all the pertinent information in the application.

7. Section 154: Rectification of an Apparent Mistake

Section 154 deals with rectification of a mistake apparent from the record.

This provision can be used when there is an error in an order or record that can be corrected without undertaking a fresh assessment of the entire case.

For example, there could be an apparent mistake in the tax calculation or a tax credit that has not been properly considered.
Taxpayers can also seek rectification where applicable. The important point is to identify the specific error and provide the relevant details while submitting the request.

8. Section 263: Revision of an Assessment Order

Section 263 provides that the Principal Commissioner or Commissioner has the authority to revise particular assessment orders, which, it may be argued, are erroneous and prejudicial to the interests of the Revenue.

This section is distinct from regular notice for providing more information. This refers to the assessment order itself and has potential tax implications.

Where one receives communication under this section, he/she needs to be clear about what is wrong with the assessment order that warrants revision by the department.

Taxpayers should consult a professional before responding to such notice.

What Are You Supposed to Do Once You Receive a Notice Regarding Income Tax?

The foremost thing to keep in mind about the process is that you should never simply disregard the notice.

The first step should be to verify whether the notice has indeed come from the Income Tax Department and via proper means of communication. The next step is to determine the section mentioned in the notice, along with the assessment year and the deadline of response.

At last, you need to compare the details in the notice with your ITR and tax-related records. This may include your AIS, Form 26AS, and TIS.

Keep the supporting documents like payroll details, banking statements, investment details, deduction details, and others ready. If there is any discrepancy, find out the reason for it before giving your answer.

Above all, don’t give any hasty answer just because you want to get rid of the case. The answer given should specifically deal with the particular query raised by the department.

Do Income Tax Notices Always Indicate That You Have Made Mistakes?

Absolutely not!

An Income Tax notice can be a result of a need for additional information from the tax department. It could also happen because of the mismatch in information between your return and the information available to the department.

At the same time, some notices can involve scrutiny, reassessment or revision proceedings and therefore require greater attention.

The key is to understand why the notice was issued, what the department is asking for and when you need to respond.
A notice is not the end of the process. In many cases, taxpayers can resolve the matter by providing the correct explanation and supporting documents.

So, if an Income Tax notice lands in your inbox, the first response should not be panic. It should be: read, verify, understand and respond within the prescribed timeline.

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