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Find out about the Real Time Information (RTI) Rules and Interface Management (RIM) artefacts and supporting technical specifications for software developers.
Check the availability and any issues affecting the VAT GIANT online service.
Agent authorisation Corporation Tax technical specifications for software developers.
Agent authorisation PAYE technical specifications for software developers.
Agent authorisation Self Assessment technical specifications for software developers.
Find the alcohol and tobacco warehouse declaration (ATWD) technical specifications for software developers.
Check the availability and any issues affecting the Business Help and Education Emails online service.
Check the availability and any issues affecting the EC Sales List (ECSL) online service.
Guidance for software developers on how to produce an IRmark for SOAP Protocol services.
Check the availability and any issues affecting the Online End of Year Expenses and Benefits online service.
Forms P60 (2019 to 2020) for PAYE software developers.
Event report XML schema, validation rules and error messages for Pension Schemes Online software developers.
Check the availability and any issues affecting the Rebated Oils Enquiry Services online service.
Guidance on identical returns for Self Assessment Online software developers.
Check the availability and any issues affecting the Tied Oils Enquiry Service online service.
Check agent authorisation technical specifications if you are a software developer.
Excise Movement and Control System (EMCS) error messages for software developers.
Find out information about the Apprenticeship Levy if you are a software developer working with payroll software.
Use forms P11D and P11D Working Sheets (2021 to 2022) to help develop payroll software if you're a PAYE software developer.
Forms P60 (2018 to 2019) for PAYE software developers.
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