Tax calculations are now largely automated. When your tax return is submitted the HMRC computer calculates how much tax you owe, or whether a tax repayment is due, and issues a tax statement. 
If HMRC’s result agrees with the tax figure the software came to, everyone is happy and your tax file can be closed for another year. 
However, sometimes the HMRC computer tries to be too clever for its own good. It compares your self assessment tax return to data it has collected from other sources such as interest reported by banks. Sometimes this third-party data may not be accurate, nor even relate to your own tax affairs. Once the computer has made a connection it raises a flag to indicate that the tax payable for the current year is too low, or the tax repayment too high. It will add in an ‘earlier year underpayment’ to your tax statement or PAYE code. 
If this happens to you we need to get your tax statement or tax code amended. This can be done through your personal tax account or by ringing HMRC. 
Please let us know if any strange adjustments appear in your PAYE code. 
Contact us straight away by telephoning 01932 564098 or email us using our ‘Contact Us’ page. 

Would you like help and advice on this or any other issue? 

Please do let us know if you have any questions or if you need any further help understanding the rules. – please call us on 01932 564098 or message us here. 

Information correct at time of publication 

This note was published from our Winter 2018 Tax Briefing dated December 2018 
Please be aware that the information above may have changed in subsequent months. 
This note is written for the general interest of our clients and is not a substitute for consulting the relevant legislation or for taking professional advice. 
Tagged as: PAYE, Tax
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