# Record OS > A modern Self Assessment operating system for UK taxpayers and accounting firms. Record OS uses AI to automate tax preparation — from document extraction to HMRC filing — so you file correctly and pay the right amount. ## Pages - [/](/): Taxpayer homepage. File your Self Assessment return with Record OS — a modern, simpler tax service. - [/about](/about): Why Record OS was built for UK taxpayers, and the team behind it. - [/firms](/firms): Accounting firm homepage. Automate Self Assessment at scale with AI-powered document extraction and HMRC filing. - [/firms/product](/firms/product): How Record OS works for accounting firms — features, workflow, and integrations. - [/firms/pricing](/firms/pricing): Pricing plans for accounting firms using Record OS. - [/firms/about](/firms/about): Why Record OS was built for UK accounting firms, and the team behind it. - [/firms/contact](/firms/contact): Book a demo or get in touch with the Record OS team. - [/firms/mtd](/firms/mtd): Guide to Making Tax Digital (MTD) for Income Tax Self Assessment. - [/firms/blog/accountants](/firms/blog/accountants): Blog for accounting firms — articles on Self Assessment, MTD, practice management, and compliance. - [/blog/individuals](/blog/individuals): Blog for taxpayers — guides and updates on Self Assessment. - [/privacy](/privacy): Privacy policy and data handling practices. - [/terms](/terms): Terms of service. - [/acceptable-use](/acceptable-use): Acceptable use policy. - [/data-processing](/data-processing): Data processing agreement. - [/sub-processors](/sub-processors): List of authorised sub-processors. ## Blog - [/firms/blog/mtd-for-itsa-accounting-firms-2026](/firms/blog/mtd-for-itsa-accounting-firms-2026): What MTD for Income Tax really means for your accounting firm — a guide to the April 2026 changes. - [/firms/blog/how-uk-accounting-firms-prepare-self-assessment-returns](/firms/blog/how-uk-accounting-firms-prepare-self-assessment-returns): How UK accounting firms prepare Self Assessment returns and where the process breaks down. - [/firms/blog/reduce-self-assessment-prep-time](/firms/blog/reduce-self-assessment-prep-time): How to reduce Self Assessment prep time without hiring more staff. - [/firms/blog/hidden-cost-fragmented-tax-workflow](/firms/blog/hidden-cost-fragmented-tax-workflow): The hidden cost of a fragmented tax workflow for accounting firms.