Our Corporation Tax software requires Microsoft® Office Excel 2007, 2010 (32 or 64 bit), 2013 (32 or 64 bit) or 2016 (32 or 64 bit). Please note that Excel as part of Office 365 is a subscription service from Microsoft and not a full version of Office/Excel. If you wish to use our software with Office 365 your plan must include a license to download and install the desktop version of Excel 2013 or 2016. Click here for details.You must ensure that your Microsoft® Office software is kept up to date with all of the latest updates from Microsoft. Click here for details. Microsoft® Office Excel 2000, XP, 2003Microsoft ended support for Microsoft® Excel 2000 on June 30th 2004, for Excel 2002/XP on July 11th 2006, and for Excel 2003 on April 8th 2014. Whilst our software should work fine on Microsoft® Excel 2000, 2002/XP and 2003, the withdrawal of Microsoft support means that we can no longer guarantee our software to work on Microsoft® Excel 2000, 2002/XP and 2003. This means that we may require you to upgrade to a later version of Microsoft® Excel should you encounter a problem with our software which we believe is related to the version of Microsoft® Excel you are running. Further, you need to be aware that using an unsupported computer program is a significant risk to your systems and data and you should consider an upgrade to avoid this risk.