Over the last few years, HMRC has been moving away from the use of 0845 numbers to 03 numbers. 03 numbers are non-geographic but are usually charged at the same rates as 01 and 02 numbers and are free with some telephone packages.
All HMRC helplines now have 03 numbers and the majority of calls are made using those numbers. Since December 2014 taxpayers using 0845 numbers to call HMRC helplines will have heard a message letting them know that the 0845 line will be closing. This was put in place to help create a smooth transition to the new 03 numbers.
From 30 June 2015, all 0845 helpline telephone numbers will be decommissioned and taxpayers dialling those numbers will hear a dead line tone. Callers will have to redial using the correct 03 number to contact the relevant department. A list of all 03 helpline telephone number is available on the GOV.UK HMRC contact us page. It is now Government and Ofcom policy to use 03 numbers.
Income Tax - 0300 200 3300
National Insurance enquiries - 0300 200 3300
Employer General enquiries - 0300 200 3200