This compares the data held in the application with the data shown on the Form CT600 and the Corporation Tax Computations that have been generated but have not yet been submitted to HM Revenue & Customs.

Online Filing Submissions

Within Online Filing, select either the Original or Amended in the Task Bar.

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If the data has changed since the IR Mark then a message appears advising the Data has changed.

View Tax Return or Corporation Tax Report Changes

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To view the changes made on either the Corporation Tax Computations or the Form CT600 select Compare current data from the top ribbon and select one of the two options:

  • Tax Return
  • Computations

Tax Return Changes

The tax return differences window details the changes at the top of the screen. Use the scroll bar on the right to xscroll down the top menu to view the changes to the boxes on the form CT600.

The Form CT600 where the IR mark has been generated is shown at the left hand side of the screen.  The Form CT600 based on the data held within the application is shown at the right hand side of the screen.  Changes to entries in the boxes on the form CT600 are highlighted in the red circles.

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Computation Changes

The changes to the corporation tax computations are shown at the top of the screen. Use the Scroll bar on the right to Scroll down to view the changes to the corporation tax computations.

The corporation tax computation where the IR Mark has been generated is shown at the left hand side of the screen. The corporation tax computation based on the data held within the application is shown at the right hand side of the screen. 

Changes to entries in the corporation tax computations are highlighted in Red.

Use the Magnifying glass icons at the top left of the previews to zoom in and out and use the scroll bars to the right and bottom to navigate through the pages of the previews

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Related

Related documents

CCH Corporation Tax 2026.3: Release Notes
Release Notes for CCH Corporation Tax 2026.3
CCH Corporation Tax 2026.2: Release Notes
Release Notes for CCH Corporation Tax 2026.2
Getting Started
This document provides a quick start guide for using CCH Corporation Tax software. It outlines essential features such as the Data Navigator, which assists in completing clients' Returns, and the use of Breadcrumbs for navigation. Additionally, it explains the functions available in the Ribbon panel located at the top of the screen. Overall, the document aims to streamline the user experience by highlighting key tools and navigation methods within the software.
Non Trade Loan Relationships
This document outlines topics related to Non Trade Loan Relationships in corporate tax computations. It includes links to sections on Non Trade Loan Relationship Summary, Credits, and Debits, detailing how to input and summarize these tax-related items in the Data Navigator. Each section describes the process for entering data and how totals are summarized for reporting purposes. Additionally, it links to related topics like Foreign Income and Miscellaneous Income.
Document Publishing
This document outlines the options for electronically storing tax returns and computations using CCH Document Management and CCH OneClick. It emphasizes that access to these tools requires appropriate licenses and user rights. Users can publish tax returns and computations both in draft form for client review and at various stages in the submission process to HMRC. The document includes specific links to guides on how to publish documents using both systems.