In this part, know what documents are to be included and in what format they have to be put together for filing CT600. Need CT600 filing service? Try us.

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What are CT600 filing requirements

What documents are to be put together while submitting company tax returns

HMRC CT600 - Who should file company tax return

What documents are required for submitting Company Tax Return to HMRC?

The online Company Tax Return pack filed through the Government Gateway will need to consist of the following attachments:

  • Corporate Tax Return forms (Form CT600) in XML;
  • Corporation Tax computation in iXBRL;
  • Statutory annual accounts of the legal entity in iXBRL (using right taxonomy);
  • Other supporting schedules in pdf.

What are the resources required for submitting Company Tax Return to HMRC?

Filers have to deal with the following steps when preparing iXBRL accounts and filing company tax returns online (CT600) with HMRC :

  • Creating, converting and tagging entity accounts in iXBRL
  • Converting and tagging CT computations in iXBRL
  • Converting other supporting schedules in pdf
  • Producing CT600 return forms in XML
  • Accessing the government gateway to file online (e-filing)
Frequently Asked Questions

Questions about the process

The CT600 form in XML, the Corporation Tax computation in iXBRL, statutory accounts in iXBRL, and supporting schedules in PDF.

Yes accounts are typically filed with both, though the underlying iXBRL files can be reused for each.

Yes supporting schedules are typically submitted as PDF attachments alongside the XML CT600 and iXBRL accounts and computation.

Yes FinTags offers a free filing checklist covering everything required for a complete submission.

HMRC can reject an incomplete filing, which risks a late filing penalty if it isn't corrected before your deadline.

Yes comparative figures are generally tagged alongside the current period's figures.