Penalties for late Self Assessment tax returns and payments Information about the penalties, what to do if you think your clients didn't need to file a return and how to make a claim for reasonable excuse
Log in to Self Assessment for Agents Go direct to HMRC Online Services
How to use the Self Assessment for Agents online service How to sign up for and use HMRC's Self Assessment for Agents online service to file clients' returns and view statements online
Tax rates and allowances Current and previous years' rates, thresholds and allowances for Income Tax, National Insurance and Capital Gains Tax
Forms for Self Assessment Find the right forms, notes and helpsheets to complete your clients' tax returns
Tools for Self Assessment Tools and calculators you might find useful when handling your clients' Self Assessment matters
Manuals and other reference material for Self Assessment Comprehensive guidance from HMRC based on tax law and published for the information of taxpayers and their advisers
Go to Self Assessment pages Information for Self Assessment taxpayers on tax bills, statements, returns, payments, deadlines, corrections, refunds and more
