How to File Income Tax Return 2026 on FBR IRIS: Step-by-Step Guide

The clock is ticking on Tax Year 2026. This guide walks salaried individuals through filing the income tax return on the FBR IRIS portal — documents, the step-by-step process, the five mistakes that get returns rejected, and what to do after you submit.

Who must file, and what late filing costs

Every salaried individual whose annual taxable income crossed Rs 600,000 in Tax Year 2026 must file a return — even if your employer already deducted tax every month. Withholding is not filing: the deduction covers the tax, but only a filed return puts you on the Active Taxpayers List.

Filing late is expensive in two ways. First, a penalty applies under Section 182 of the Income Tax Ordinance. Second, until your return is on record and your ATL status is restored, you pay higher withholding rates on salary, bank profits, property transactions, and vehicles. Non-filers also lose filer-only benefits across the year. The return itself is free to file on IRIS — the penalty for skipping it is not.

Documents checklist: gather these first

Open IRIS only after you have everything in one place. You will need:

• Your IRIS login credentials (registration number and password; keep the registered mobile and email active for verification codes).
• Salary slips for the full fiscal year, or the annual salary certificate from your employer.
• Bank statements for all accounts for the year.
• Withholding tax certificates — from your employer, banks (profit on deposits), and any other deducting party.
• Rent or property records, if you earned rental income or sold property.
• A list of your assets and liabilities (bank balances, vehicles, property, loans) for the wealth statement.

IRIS step-by-step walkthrough for a salaried individual

1. Log in to IRIS. Go to the FBR IRIS portal and sign in. If this is your first return, complete the registration and make sure your profile (address, contact, bank accounts) is current.
2. Open the Tax Year 2026 return. From the declarations menu, select the Income Tax Return for Tax Year 2026. Double-check the tax year — picking the wrong year is the most common rejection reason.
3. Declare your income. Enter salary income exactly as shown on your annual salary certificate, then add any other income: bank profit, rental income, or capital gains. Match every figure to a document.
4. Add deductions and tax credits. Claim every deduction and credit you are entitled to — approved donations, profit on debt, and other admissible items. This is where most salaried filers leave money on the table.
5. Reconcile the wealth statement. List opening and closing assets and liabilities. The statement must reconcile: unexplained increases in wealth raise questions. Take this tab slowly.
6. Review the computation summary. Review the computation summary: it shows whether you owe additional tax or are due a refund. If tax is payable, generate the payment slip and pay through the prescribed banking channel before submitting.
7. Submit and save the e-acknowledgement. Submit the return, then download and save the e-acknowledgement. It is your legal proof of filing — keep it with your tax records.

The 5 IRIS mistakes that cause rejection

1. Wrong tax year selected. The portal lists multiple years. Filing in the 2025 form when you meant 2026 means starting over.
2. Wealth statement does not reconcile. If closing assets cannot be explained by declared income, the return gets flagged. Match every asset to a source.
3. Missing final-tax credits. Tax already deducted at source (salary, bank profit) must be entered as credit. Skip this and the system thinks you owe tax twice.
4. Unclaimed withholding. Every withholding certificate you hold should appear in the return. Unclaimed withholding is money you paid but never got credit for.
5. Unverified computation sheet. Always open the computation summary before submitting. A five-minute review catches entry errors that take weeks to fix after submission.

After filing: confirm, save, and stay on the ATL

After submitting, verify your status on the Active Taxpayers List once FBR processes the return — the online check and SMS service both work. Keep the e-acknowledgement, the computation summary, and all supporting documents for at least six years.

Missed 31 October? File anyway, as soon as possible. Late filing attracts a penalty under Section 182 and higher withholding rates until your filer status is restored — but filing late beats not filing, because your ATL status only recovers once a return is on record.

Related guides: FBR Tax Return Filing Guide, Active Taxpayer List Check Pakistan.