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features
design
support

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Description

CT600Filing is a web-based software solution designed for UK limited companies and accounting firms to facilitate the filing of Corporation Tax returns. It provides a step-by-step process for completing a CT600 return, automatically calculating the Corporation Tax as data is entered, and accommodating additional schedules such as capital allowances and R&D claims. The platform can create iXBRL accounts compliant with FRS 102 or FRS 105, or it can accept accounts prepared by other means, and it efficiently submits CT600 returns to HMRC along with annual accounts to Companies House through their respective filing gateways. Users have the flexibility to prepare their returns before making any payments, with straightforward pricing options for each accounting period and various plans tailored to company size; there are also credit bundles available for accountants. The software includes a multi-company workspace that tracks filing statuses, deadlines, and submission histories for various client or group entities. Functioning entirely online without the need for desktop installation, it caters not only to company directors but also to bookkeepers, accountants, and tax professionals engaged in UK Corporation Tax submissions. With its user-friendly interface and comprehensive features, CT600Filing simplifies the tax filing process for all involved parties.

Description

Thomson Reuters GoSystem Tax RS stands out as the leading choice for corporate tax departments, utilized by the top 100 CPA firms in the industry. Its scalable nature allows it to adapt to the workflow requirements of firms of any size. This versatile software accommodates clients filing various types of returns, such as multitiered consolidated corporate returns, life insurance returns that include mixed group filings, and tax equalization returns. Operating entirely online reduces maintenance costs, minimizes storage challenges, and ensures peace of mind with reliable business continuity. It is equipped to manage intricate tax return processes, particularly those involving multitiered consolidated returns for both corporations and partnerships. Teams can work simultaneously on a single return, enabling each specialist to address their specific responsibilities concurrently. Furthermore, it safeguards your sensitive data through multiple security layers, which encompass network security, virus protection, and advanced encryption methods, among others. This comprehensive approach not only enhances efficiency but also fosters collaboration within tax departments.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

GoFileRoom No 
SafeSend No 
Workpapers CS No 

Integrations

GoFileRoom Yes 
SafeSend Yes 
Workpapers CS Yes 

Pricing Details

£49/filing
CT600Filing starts from £49 + VAT per return. Prepare free, pay when you file. No subscription.

All plans include CT600 filing to HMRC and accounts submission to Companies House:

Dormant & Nil Return – £49 + VAT: Nil CT600 to HMRC and dormant accounts filing to Companies House.

Micro Company – £79 + VAT: CT600, FRS 105 iXBRL accounts and Companies House filing.

Small Company – £159 + VAT: CT600, FRS 102 Section 1A iXBRL accounts and Companies House filing.

Medium & Large – £299 + VAT: CT600, full FRS 102 accounts and Companies House filing.

Each payment covers one return, with unlimited amendments for that return. Returns are submitted directly to HMRC, and accounts are filed with Companies House.

Accountants and bookkeepers: Filing credits start at £399 + VAT for 10 filings, reducing to £10.99 per filing with the 100-credit bundle. Credits are valid for 12 months.

No monthly subscription. Prepare your return free and pay only when ready to submit.
Free Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person Yes 

Vendor Details

Company Name

Swift Catalyst Ltd

Founded

2026

Country

United Kingdom

Website

www.ct600filing.co.uk

Vendor Details

Company Name

Thomson Reuters

Founded

2008

Country

Canada

Website

tax.thomsonreuters.com/us/en/cs-professional-suite/gosystem-tax-rs

Product Features

Corporate Tax

Compliance Management No 
Data Import / Export Yes 
Data Verification Yes 
Electronic Filing Yes 
Exception Notification No 
For Nonprofits No 
For Partnerships No 
K-1 Reporting No 
Payroll & Employer Forms No 
Status Tracking Yes 
Tax Planning No 

Product Features

Corporate Tax

Compliance Management No 
Data Import / Export No 
Data Verification No 
Electronic Filing No 
Exception Notification No 
For Nonprofits No 
For Partnerships No 
K-1 Reporting No 
Payroll & Employer Forms No 
Status Tracking No 
Tax Planning No 

Tax Practice Management

Approval Process Control No 
Billing & Invoicing No 
Client Management No 
Client Portal No 
Document Management No 
Due Date Tracking No 
Scenario Planning No 
Tax Filing No 
Tax Forms No 
Workflow Management No 

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