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Get guidance from HMRC if you're a tax agent or an adviser.
This factsheet tells you about the penalties HMRC may charge if there has been an under-assessment and you have not told us about it within 30 days.
Get help if you’re a tax agent or adviser who has clients with capital allowances for plant and machinery to declare on Self Assessment and Company Tax returns.
Employers and traders, HMRC may ask for a deposit or bond.
Find out about the Machine Games Duty for Agents online service and how to register.
How to pay Intrastat penalties, and how long it takes for your payment to reach HMRC.
Find out when to use the zero rate of VAT when supplying machine tools that stay in the UK but are used to manufacture goods for export.
CT600 V3 (2024) and V2 (2009) RIM artefacts for Corporation Tax software developers.
Check the availability and any issues affecting employment related securities (ERS).
Check examples to help you calculate your employee's wages, National Insurance contributions and pension contributions if you're claiming through the Coronavirus Job Retention Scheme.
Use the GAAR Advisory Panel opinion on a repayment of a participator loan through transactions involving group companies, to help you recognise when arrangements may not be abusive tax arrangements.
Use forms P11D and P11D Working Sheets (2020 to 2021) to help develop payroll software if you're a PAYE software developer.
Check the availability and any issues affecting the Safety and Security GB (S&S GB) service.
SDLT5 substitute technical specifications for Stamp Tax Online software developers.
HMRC can tax loans paid to contractors or freelance workers through trusts or umbrella companies, just like normal income.
Find out about tax avoidance schemes that use remuneration trusts to reduce profits and disguise income.
Records and paperwork you must keep if you’re a passenger plane operator.
Local Test Service (LTS), Gateway Reflector and compressed data xml samples for Charities Online software developers.
Remits of the Tax Disputes Resolution Board and the Customer Compliance Group Disputes Resolution Board.
IRmark code examples in JAVA.
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