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If you're sending HM Revenue & Customs (HMRC) a Self Assessment tax return, you can do it online using the secure service HMRC provides. There are many advantages to filing or sending your tax return online instead of by paper, including automatic calculations, faster processing and later deadlines.
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There are lots of advantages to sending your tax return online:
You can use the free HMRC Self Assessment service or commercial software to send most tax returns online.
Some types of tax return aren't covered by the free HMRC Self Assessment service, but you can buy commercial software to send them online. These include:
You need to be registered to use HMRC Online Services before you can send your tax return online for the first time. This applies whether you use the free HMRC service or commercial software. See the section below for more information about using HMRC Online Services for the first time.
There is currently no free HMRC Self Assessment service or commercial software for sending the following returns, so you will need to send them on paper:
If you’re newly self-employed, HMRC will set up your Self Assessment Online account automatically when you register for business taxes.
If you're setting up a partnership, a Self Assessment Online account will automatically be set up for the Partnership.
In all other cases, you'll need to sign up to use HMRC Online Services yourself.
You'll need the following information:
You'll find your UTR on correspondence from HMRC. If you can't find it, you can contact the Self Assessment Helpline and ask for it to be sent to your home address. HMRC can't tell you your UTR over the phone.
If you haven't completed a tax return before (or it's been a while since you did), you may not have a UTR. You'll need to tell HMRC why you need a tax return, by registering for Self Assessment, so you can get a UTR.
If you already have a Self Assessment tax record and a Unique Taxpayer Reference, getting online with HMRC is a three-stage process, you:
If you registered online for business taxes after April 2012, your Self Assessment Online account will have been set up for you automatically. You'll just need to wait for your Activation Code to arrive and then activate your account.
This is an added security measure to make sure that only you can use your account.
If you've already registered for HMRC Online Services and activated your Self Assessment Online account, use the link below to log in and use Self Assessment Online.
If you can't find your ID or your password, you can get a replacement. Go to the online services login page (see the link below), then follow the 'Lost User ID' or 'Lost password' links.
For security purposes you'll need to answer a number of questions before a replacement User ID or password is issued. Your ID or password will be sent to you online, if you've provided a current email address, or by second class post.
If you’ve lost both your User ID and password, you may be able to use the online form to request your User ID (see link below).
For information on service availability and any technical issues with Self Assessment Online follow the links below. You’ll find the latest Self Assessment service availability details and information about any current service issues and how HMRC is dealing with them.
If you have problems registering for Self Assessment Online, you can contact the HMRC dedicated Online Services Helpdesk.