The March 2012 Budget announced changes to Corporation Tax rates and allowances from April 2012 including reductions in the main rate of Corporation Tax from 26 per cent to 24 per cent and the small profits rate held at 20 per cent.
The rate changes affect returns with accounting periods that end on or after 1 April 2012 with filing dates of 1 April 2013 or later.
These changes took effect on 17 July 2012 when Finance Bill 2012 received Royal Assent. The Corporation Tax online service has been updated with the new rates and can now be used to file all Company Tax Returns.
If your company is liable at the main rate and you intend to use HMRC's free online filing software to submit a return for an accounting period ending on or after 1 April 2012, you will need to download the latest version of the form. You won't be able to use earlier versions as they don't include the new rates.