Use form CT600 (2017) Version 3 to file a Company Tax Return for accounting periods starting on or after 1 April 2015.
PDF, 486KB, 11 pages
Use form CT600 (2017) Version 3 for any accounting periods starting on or after 1 April 2015. Refer to the CT600 guide (2017) Version 3 for help and a full list of companies that should use this form.
Check if you need to submit this form before downloading and sending it in the post.
Find out more about who must submit an online Company Tax Return.
CT600A (2015) Version 3: close company loans and arrangements to confer benefits on participators
CT600B (2015) Version 3: controlled foreign companies and foreign permanent establishment exemptions
CT600C (2017) Version 3: group and consortium relief
CT600D (2015) Version 3: insurance
CT600E (2015) Version 3: Charities and Community Amateur Sport Clubs (CASCs)
CT600F (2015) Version 3: Tonnage Tax
CT600H (2015) Version 3: cross-border Royalties
CT600I (2015) Version 3: supplementary charge in respect of ring fence trades
CT600J (2015) Version 3: disclosure of tax avoidance schemes
CT600K (2017) Version 3: Restitution Tax
Use the Company Tax Return guide (CT600 Guide (2017) Version 3) to help you complete form CT600 (2017) Company Tax Return.
Use the Budget changes (CT600 Budget Insert) for an overview of the main Budget changes affecting Corporation Tax.
Use form 64-8: authorise your agent to authorise HM Revenue and Customs to communicate with an accountant, tax agent or adviser acting on your behalf.
Don’t include personal or financial information like your National Insurance number or credit card details.