
Published 7 April 2015
Last updated 3 September 2021 + show all updates
-
The guide to help you complete form CT600 (2021) version 3 has been updated.
-
New CT600 guide (2021) version 3 has been added.
-
Updated for 2021.
-
The guidance has been updated with information about Capital Allowances and the Non-Resident Landlords scheme to make things clearer for software developers and their customers.
-
New CT600 guide (2020) version 3 has been added.
-
Guide changed to link to the new Finance Act where needed.
-
New CT600 guide (2019) version 3 added.
-
The guidance has been updated with information about restitution tax for boxes 170 and K20.
-
The guidance for Loss Reform and Corporate Interest Restriction (CIR) to help companies file their Company Tax Return has been updated.
-
The guidance has been updated with information relating to the number of 51% companies and clarification of the supplementary charge rate.
-
The PDF has been updated to correct parts of the CT600 guide (2018).
-
The guide has been updated to clarify parts of the CT600 form.
-
New CT600 guide (2018) version 3 added.
-
CT600 guide (2017) has been updated to include the new loss reform rules that apply for periods ending on or after 1 April 2017.
-
New CT600 guide (2017) version 3 added.
-
CT600_Guide_V3. replaced by CT600_Guide _V0.1
-
First published.