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Find technical specifications for software developers working with the Corporation Tax online service.
Follow this guidance if you’re responsible for choosing, buying and managing Software as a Service (SaaS) tools in your organisation.
Technical specifications for software developers working with the PAYE online service.
This manual describes the software specification behind producing the Advisory Report for Display Energy Certificates.
Farm software companies that have successfully passed testing for the Cattle Tracing Service (CTS) Web Services.
Guide to licensing requirements and restrictions for trade control and the export of controlled military goods, software and technology.
Specifications and guidelines for Real Time Information internet submissions and for the outgoing Data Provisioning Service.
Technical specifications for developing software to send information to Companies House digitally.
Use Self Assessment software to help populate your Self Assessment tax return.
The CMA is investigating whether ESS has broken the law by taking action to prevent schools from switching to a new management information system provider.
Support and technical specifications for software developers working with the Self Assessment online service.
Manage, check and withdraw permission you've given to software applications to share and update your tax information
Find a list of simple record keeping applications, including cash basis and simplified expenses specifications.
Check for free and paid-for software recognised by HMRC that you can use to report PAYE information online.
List of companies who advised the New Computerised Transit System project team of their intention to develop commercial software solutions for NCTS.
Don’t include personal or financial information like your National Insurance number or credit card details.
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