Ftax MTD for IT includes BOTH the Quarterly update form AND the End-of-Year form.
Ftax MTD for IT includes BOTH the Quarterly update form AND the End-of-Year form.
The Ftax CT600 can generate both iXBRL Computation and Accounts files.
XBRL is the data format which all computations and accounts files must be converted into before attaching to the CT600 and submitting. HMRC have introduced this customised data format as it is readable both by the human eye and by computers.
If you used HMRC’s free filing service, it created your iXBRL files for you. That service closed on 31 March 2026, so you now need software that does it. The Ftax CT600 creates both iXBRL files and submits them with your return.
HMRC and Companies House closed their free joint filing service on 31 March 2026. Small companies that used it now need software or an agent to file their CT600, so you may see more enquiries from companies that have never used an accountant for their tax return.
The Ftax CT600 can generate both iXBRL Computation and iXBRL Accounts files:
Businesses may purchase Ftax Company to generate both iXBRL files and submit to their CT600 tax return to HMRC themselves. Agents may purchase Ftax Agent Company to generate iXBRL files and submit CT600 tax returns to HMRC on behalf of their clients.
Ftax does not provide accounting, tax, business or legal advice. This guide has been provided for information purposes only. You should consult with your own professional advisors or with HMRC for advice directly relating to your business before taking action in relation to any of the content provided. Ftax Support will only be able to assist you with matters directly concerning the Ftax products and service.
Ftax is fully MTD compliant.
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