Change Your Mobile Number, Address or Bank Account in FBR IRIS
Update your mobile number, address or bank account in FBR IRIS with Form 181 online. See which changes need a Regional Tax Office visit and why it matters.
Short answer: You can change your mobile number, residential address, business address, bank account, business branches and legal representative yourself by logging in to IRIS and filing the registration modification, which FBR calls Registration Form 181. Changing your CNIC number, email, or closing your registration needs a visit to your Regional Tax Office.
The commonest tax problem we see is not a big one. A person changes their SIM, moves house or switches banks, and FBR still has the old details. The refund goes to a closed account. The message goes to a dead number. The notice goes to a house you no longer live in.
We read the FBR page "Change Your Personal Details" on 12 October 2026. This guide follows that page and says plainly where the page stops.
FBR lets you change six details yourself through IRIS
FBR says a person can update their registration information in two ways. The first is by logging in to IRIS. Through Registration Form 181, filed for modification, you can change six items without visiting an office.
- Mobile number.
- Personal or residential address.
- Business address.
- Addition of business branches.
- Legal representative under section 87 of the Income Tax Ordinance 2001.
- Bank account.
A "legal representative" is the person who acts for you in tax matters, for example for a minor or for someone who has died. IRIS is FBR's online system for income tax registration and returns. You reach it from the IRIS login on the FBR website.
Some changes need a visit to your Regional Tax Office
For six other changes FBR says you must go to your relevant Regional Tax Office, the RTO. These are discontinuance of business, the jurisdiction for assessment of your return, deregistration, updating your CNIC number, email, and updating your Pakistan Origin Card.
Take the relevant documents with you. FBR's page does not list which documents each change needs. Ask the RTO for the list when you call or visit.
| What you want to change | Where, according to FBR |
|---|---|
| Mobile number | IRIS, Form 181 |
| Home address | IRIS, Form 181 |
| Business address or branches | IRIS, Form 181 |
| Bank account | IRIS, Form 181 |
| Legal representative (section 87) | IRIS, Form 181 |
| CNIC number | Regional Tax Office |
| Email address | Regional Tax Office |
| Close your business or deregister | Regional Tax Office |
| Change of assessment jurisdiction | Regional Tax Office |
How to file the change in IRIS
Log in to IRIS with your own credentials, open your registration details and file the modification form with the new information. FBR's page tells you the form number and the fields you can change. It does not list each screen, so follow the prompts in IRIS.
- Log in to IRIS from the FBR website.
- Open the registration modification form, Form 181.
- Change only the detail that is wrong. Leave the rest.
- Check the new mobile number, address or bank details against your own papers.
- Submit the form and keep the acknowledgement.
If you have forgotten your IRIS password, fix that first. Our guide to IRIS 2.0 login errors lists the usual causes. If you file through the app, the Tax Asaan app is another route to your return, but we have not seen FBR say it can modify registration.
Why the bank account and mobile number matter most
A tax refund, if one is due, needs a bank account on your record. FBR's sales tax refund page asks taxpayers to add the full IBAN of the same bank account already on their IRIS profile, to receive refunds electronically. A wrong or closed account stalls a refund.
The mobile number matters for a different reason. The draft Rule 38B on electronic scrutiny speaks of electronic intimation and reminders. We covered it in our note on FBR's draft Rule 38B. A number you no longer use means you may miss the seven days it gives you to respond.
Before you claim an income tax refund, read how to claim an income tax refund from FBR and check that the account named there is current.
What FBR's page does not tell you
The page is short. It does not give a processing time, a fee, the exact documents for RTO visits, or a way to track the form. It also does not say what happens if you hold both an income tax and a sales tax registration.
So treat the form number and the two routes as confirmed, and the rest as unknown. Keep your acknowledgement and screenshot of the updated profile. If the change does not show, call the FBR helpline on +92 51 111 772 772 or email helpline@fbr.gov.pk.
Common questions
Can I change my mobile number in FBR IRIS myself?
Yes. FBR lists the mobile number among the details you can change by filing Registration Form 181 for modification in IRIS.
Can I change my CNIC number in IRIS?
No. FBR says updating the CNIC number needs a visit to your relevant Regional Tax Office.
How do I change my bank account with FBR?
Log in to IRIS and file the modification form with the new account. FBR lists the bank account among the six changes you can make online.
Can I change my email address online?
According to FBR's page, changing an email address is done through the Regional Tax Office, not through Form 181.
What is Form 181?
It is the registration form FBR uses for income tax registration. When filed for modification it updates the details recorded on your registration.
How do I close my tax registration?
FBR lists discontinuance of business and deregistration as RTO matters. Visit your Regional Tax Office with the relevant documents.
How we verified this
What we checked, where we read it, and what we could not confirm.
We read FBR's Change Your Personal Details page and its sales tax refund page on 12 October 2026. We could not open the IRIS screens, so the menu names inside IRIS are not confirmed. Check the FBR page again before you file.
About the author
Public Services and Education Journalist
Fajr Riaz is a journalist and content writer at Pakistan Era, based in Lahore. She covers the questions people meet in everyday life in Pakistan: how a public service works, what a change in the rules means, and where to find a reliable answer.
