Updated: Supplementary pages CT600C (2015) have been updated to CT600C (2017).
Use these supplementary pages if you’re claiming or surrendering relief under group or consortium, or unrelieved foreign tax provisions.
Please check if you’re required to submit this form online before downloading and sending it in the post.
Find out more about who must submit an online Company Tax Return.
Related forms and guidance
Use form Company Tax Return (CT600 (2017) version 3) to file a Company Tax Return for accounting periods starting on or after 1 April 2015.
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.
Source: HMRC