AccountingWEB members have flagged up a minor bug in HMRC’s Corporation Tax efiling mechanism that blocks submissions that include both PDF and iXBRL format files for computations and accounts.
In an Any Answers thread Sudipta Moore of Moore Accountancy explained that HMRC’s online filing system rejected a CT600 and computations that were accompanied by a PDF attachments for the year to 10 June. HMRC’s system responded with the message: “X ERROR: If the period 'To' date is on or after 01/04/2010 and the date of submission is on or after 01/04/2011, the Accounts must be submitted in InlineXBRL format.”
HMRC’s Corporation Tax service issue page currently offers the clarification that its free to use Company Tax Return filing product will not allow submission of the return if the accounts and computations files are not both in iXBRL or PDF. The user can submit the return so long as both the accounts and computations files are in the same format.
A spokesman told AccountingWEB.co.uk HMRC plans to upgrade the mechanism in October to allow submission of a mixed submission of iXBRL and PDF files for the period leading up to April 2011, when only iXBRL attachments will be accepted.