CT600Filing

CT600Filing

Swift Catalyst Ltd
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About

CT600Filing is online Corporation Tax filing software for UK limited companies and accountancy practices. It guides users through a CT600 return, calculates Corporation Tax as figures are entered, and supports supplementary schedules such as capital allowances and R&D claims. The service generates iXBRL accounts using FRS 102 or FRS 105, or accepts accounts prepared elsewhere, then submits CT600 returns to HMRC and annual accounts to Companies House through their filing gateways. Users can prepare returns before paying, with one-off pricing per accounting period and plan options based on company size; accountant credit bundles are also available. A multi-company workspace provides filing status, deadlines, and submission history for client or group entities. The product runs online without desktop installation and serves company directors, bookkeepers, accountants, and tax professionals handling UK Corporation Tax filings.

About

National Tax Office provides a professional tax preparation platform and business tools designed to help tax preparers start, manage, and grow a tax preparation business through a centralized digital platform. It functions as an all-in-one environment that includes tax preparation tools, training resources, support services, and integrated financial products required to operate a tax office. It is available as both a web-based and desktop system, allowing preparers to prepare and electronically file federal and state tax returns for individuals and businesses while maintaining access to current and prior-year forms in one place. It supports unlimited electronic filing and enables tax professionals to work from any location while maintaining control and visibility over their business operations. It includes multiple workflow modes, such as step-by-step interview guidance or direct form-based input.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

UK limited companies, accountants, sole traders acting through limited companies, and tax professionals.

Audience

Tax preparers and tax businesses that want a tool to prepare and e-file tax returns while managing clients, documents, and tax office operations

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

£49/filing
Dormant & Nil Return: £49 + VAT per accounting period for a nil CT600 only. Micro: £79 + VAT; Small: £159 + VAT; Full Accounts: £299 + VAT per accounting period. Accountant bundles range from £399 + VAT for 10 credits to £1,099 + VAT for 100 credits (£10.99 per filing at 100 credits). Preparation is free; payment is due at submission. No subscription.
Free Version Supported
Free Trial Not Supported

Pricing

$199 per month
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

Swift Catalyst Ltd
Founded: 2026
United Kingdom
www.ct600filing.co.uk

Company Information

National Tax Office
United States
www.nationaltaxoffice.com

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Categories

Corporate Tax Supported

Categories

Integrations

No info available.

Integrations

No info available.
Claim CT600Filing and update features and information
Claim CT600Filing and update features and information
Claim National Tax Office and update features and information
Claim National Tax Office and update features and information