FBR Introduces Online Checks for Sales Tax Returns: What Businesses Should Do If IRIS Flags an Error

Source checked 1 October 2026: This explanation is based on FBR’s SRO 1655(I)/2026 dated 25 September 2026, which inserts the electronic-scrutiny chapter into the Sales Tax Rules. Read your own IRIS intimation for the issue, period and response date.

FBR has introduced a new way to check sales tax returns for mistakes and mismatched information. Under SRO 1655(I)/2026, issued on 25 September 2026, its computerised system may compare a registered business’s sales tax return with other data available to FBR. If the system finds an issue, it may send an online advice or advance intimation through IRIS.

For businesses, the practical message is simple: check your IRIS account regularly, read any message carefully and respond within the time stated.

What has changed?

FBR has added a chapter on electronic scrutiny to the Sales Tax Rules, 2006. The system may identify a factual mistake, a legal issue or a discrepancy in a sales tax return. An Inland Revenue officer with jurisdiction may also send a system-generated advance intimation.

The intimation is meant to give the registered person a chance to explain the issue, correct an error or take other appropriate action before FBR begins legal or penalty proceedings. Receiving one does not, by itself, mean a penalty has been imposed.

How long does a business have to respond?

The IRIS intimation must state a response period of at least seven days. If the business does not respond within that period, a reminder must be sent with a further period of at least seven days. Businesses should follow the dates shown in their own IRIS messages rather than assume every notice has exactly seven days.

What should you do if IRIS flags a discrepancy?

First, read the intimation to see which return and issue it concerns. Compare the information mentioned there with your filed return and supporting records, such as sales and purchase invoices. If the return contains an error, check the appropriate way to correct it. If your figures are accurate, prepare a clear explanation with the relevant records and respond within the stated period.

FBR’s rules say the intimation, the taxpayer’s response and any action taken will be recorded in the system. The relevant Inland Revenue officer will review the response and may take further action where required under the law.

The new rules set out the electronic scrutiny procedure. They do not say that every mismatch will result in a penalty. For sales-tax-registered businesses, keeping records in order and paying attention to IRIS messages will make it easier to deal with a question if one arises.

Build a clear response file

For example, if a purchase total does not match, create a short reconciliation showing the return figure, the amount raised in the intimation, and the invoices explaining the difference. Identify missing or duplicate entries separately instead of submitting a long, unexplained invoice bundle.

• Save the intimation and note when you received it.
• Identify the disputed line or transaction and the relevant return period.
• Label supporting records so each document can be matched to your explanation.
• Keep a copy of the response and its submission evidence.
• Monitor further messages; a reminder is not a reason to ignore the first response date.

This is a practical records workflow, not a prescribed response form or a guarantee that FBR will accept the explanation. If the issue concerns a legal interpretation, obtain advice before changing a filed return.

Use the official IRIS portal. For timing, see our August-period deadline clarification. Report errors with the specific rule or document through our corrections procedure.