HM Revenue & Customs (HMRC) free Corporation Tax Online filing software is a downloadable PDF.
Before you can use its full functionality, you must make sure you have Adobe Reader software version 9.2 (or later) installed on your computer and have changed your Adobe Reader security settings.
Download a guide on changing settings in Adobe Reader (PDF 694K)
Download a guide to help with common problems changing settings in Adobe reader (PDF 1.1MB)
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Help for customers who need information in alternative formats
