There are a number of occasions when you need to tell HM Revenue & Customs (HMRC) about changes to your business details for Corporation Tax. For example, you'll need to tell HMRC if you change the contact details for your company or organisation, or appoint an accountant or tax adviser to deal with your Corporation Tax affairs.
This guide explains when and how to tell HMRC about these changes to your company or organisation. It also explains how you can tell HMRC about many of these changes online.
On this page:
You should tell HMRC (and in some instances Companies House - see the section on changing your registered company name and/or address below) as soon as possible if your company or organisation's name or contact details change.
You should do this even if you've already informed other HMRC tax areas such as VAT or PAYE. You can do this online or by post. The following sections show you how to do this.
If your company or organisation is enrolled for the HMRC Online Service - Corporation Tax Online - you can easily and securely add, change or delete your company or organisation details.
If you've appointed an accountant or tax adviser (an agent) to deal with HMRC on your behalf for Corporation Tax, they can also update your details online.
Limited companies can update the following details online using Corporation Tax Online:
Unincorporated organisations such as clubs or associations can update the following details using Corporation Tax Online:
If you're already signed up to use Corporation Tax Online, use the link at the end of this section to go to the login page. Then:
Any online changes you make will normally be updated within 48 hours (this may take slightly longer over a weekend or bank holiday).
If you're not yet signed up to use Corporation Tax Online you can register by following the link at the end of this section.
Alternatively you can contact your Corporation Tax Office about changes to your company or organisation's name or contact details. To find your Corporation Tax Office, follow the link at the end of this section.
See a demonstration of how to change your Corporation Tax details online
Corporation Tax Online: the benefits and how to sign up
Log in to Corporation Tax Online
Find your Corporation Tax Office
If you want to change the registered name and/or the registered office address of your limited company you must tell Companies House. You can inform Companies House online at the Companies House website. As soon as Companies House has updated their records they'll advise HMRC about the change automatically. You don't need to tell HMRC separately unless you are changing the contact details for a Group Payment Arrangement.
Read more about Group Payment Arrangements for Corporation Tax
Go to the Companies House website (Opens new window)
If you've appointed a tax adviser or an accountant to act as your authorised agent to deal with HMRC on your behalf for Corporation Tax matters, you can let HMRC know about any changes using Corporation Tax Online. You can add, change or remove your authorised agent online.
If you're already signed up to use Corporation Tax Online, use the link at the end of this section to go to the login page. Then follow these steps to notify HMRC of any changes:
Any online changes you make will normally be updated within 48 hours (this may take slightly longer over a weekend or bank holiday).
If you're not yet signed up to use HMRC Corporation Tax Online Services you can register by following the link at the end of this section.
You can also tell HMRC you've appointed or changed your agent by downloading and completing form 64-8 (Authorising your agent). If you’re sending the form only to authorise your agent to deal with your Corporation Tax affairs, send it to the HMRC office that deals with the company - otherwise send it to the address shown on the form.
See a demonstration of how to change your authorised agent online
Find out how to set up a Corporation Tax Online Services account
Log in to Corporation Tax Online
Go to form 64-8 (Authorising your agent)
Find your Corporation Tax Office
If you file your Company Tax Return using Corporation Tax Online, you can easily change your Corporation Tax accounting period. On the 'Period of return' page, select the particular accounting period you want to amend and click on 'change period'. Then follow the on-screen instructions.
Any online changes you make will normally be updated within two working days.
Alternatively, you can contact your Corporation Tax Office.
See a demonstration of how to change your accounting period
Log in to Corporation Tax Online
Find your Corporation Tax Office
Trading and non-trading for Corporation Tax explained
