From 1 April 2011, for any accounting period ending after 31 March 2010, all Company Tax Returns must be filed online with accompanying accounts and computations in Inline eXtensible Business Reporting Language (iXBRL) format.
In preparation for this, HM Revenue & Customs (HMRC) is updating their Corporation Tax Online service on 23 November 2009. Although the main features of the online service will remain the same, many existing filing software products that enable you to file your Company Tax Return online will no longer be accepted by HMRC systems from this date. To file online on or after 23 November 2009, you need to make sure that your software incorporates the latest upgrade; otherwise it might not work properly. You should check with your software supplier if you haven’t already done so.
The current HMRC Corporation Tax online return form will also be withdrawn and replaced with updated software on 23 November 2009. If you plan to use the online return before then, HMRC recommend you do so by 18 November 2009.
If you have any data saved on the current HMRC online return you must make sure that you save it onto your own computer before 19 November 2009. You won’t be able to access your data through the HMRC Corporation Tax online filing service after that date.
More about Corporation Tax Online and online filing requirements
