• Make sure you sign the return. Forgetting to sign is one of the most frequent errors on hard copies of the return and can lead to a missed deadline.
  
  
• Always identify anything contentious in the additional information box, it may save an enquiry into the return.
  
  
• If you are planning to file online, you should register immediately, as there is a delay while you are sent your user details and password. HMRC recommends registering by 22 January - so it may be too late for some already.
  
  
• Remember to make an entry in box 19 if you want to receive a refund of any tax overpaid in the year. You can choose to have your refund paid directly to charity and you will then receive tax relief on your refund. If you do not claim a refund, HMRC will keep it as a credit on your account.
  
  
• You must complete Capital Gains Tax pages either if the disposal proceeds exceed £35,200 in total, your taxable gains exceed £8,800 (the annual exempt amount for 2006/07), losses are being offset against gains totalling more than £8,800 (before the offset), claims or elections are being made or if a capital gains tax liability arises on your main residence.
  
  
• Keep a log of all gift aid payments made in the year and anything you have ticked the gift aid box on i.e. sponsorship forms. If you are a higher rate taxpayer you will be due relief.
  
  

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• Get hold of copies of all your income and benefits. If you are an employee you should have been sent a P60 by your employer setting out your salary and tax paid in the year and possibly a P45 if you changed jobs during the tax year. If you have any taxable benefits, like a company car, your employer should have sent you a Form P11D listing those you need to report.
  
  
• In calculating your tax liability, make sure that you have taken into account any outstanding tax which is being collected for a previous year through your tax code.
  
  
• Don’t forget that you may have income on which you have a tax liability, even though the income has not yet been paid to you. This might happen, for example, if you have an interest in a trust that you have created, or where you are a beneficiary of an Estate of a deceased relative. The Executors should be able to give you this information. Income tax is payable in installments. Apart from the balancing payment for 2006/07, which is due on 31 January, you may also have to make the first interim payment for 2007/08. This will normally be based on your income tax liability for 2006/07, but you can apply to reduce the interim payment if you have good reasons for believing that the tax liability for 2007/08 will reduce from the previous year.
  
  
• You may be entitled to extra relief if your employer has reimbursed you for business mileage at a lower rate than that allowed in the approved mileage allowance payment (normally 40p per mile for 2006/07). If you receive less than this, you can claim the difference as a business expense, always assuming that the business mileage was wholly, exclusively and necessarily incurred as part of your employment.

• Those who have overpaid tax during 2006/07 will benefit from filing their self assessment form. This particularly appeals to those who have savings taxed at source and those who have spent time abroad.
  
  
• Finally if you get into difficulty, you can ring HM Revenue and Customs Helpline on 0845 9000 444, or visit the website at www.hmrc.gov.uk

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