UK Domestic Tax Research Specialist

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. We help people start and grow freelance careers teaching AI by centralizing opportunities, letting contributors build a unified portfolio, and managing hiring and contracting directly through OpenTrain AI.

We hire specialists for short- and long-term projects that shape how modern AI systems behave. Creating an OpenTrain account is free and the first step to applying.

About AI training work

AI training (data labeling, annotation, human feedback) is the human side of building intelligence: people prepare, review, and improve examples models learn from. Tasks range from evaluating model outputs to refining technical content and validating supporting authorities.

This work is largely remote, flexible, and accessible to experienced practitioners who want to apply domain expertise to directly influence how AI handles specialized topics such as tax, law, and finance.

The role

OpenTrain AI is hiring UK domestic tax specialists to review and improve AI-generated tax research focused on UK domestic taxation. This is a part-time contractor role requiring 20+ hours/week, performed remotely in the UK.

Compensation is pay-per-hour at USD 110–140/hr (listed hourly rate USD 140). Work will involve detailed technical review, rewriting model answers, validating authorities, and refining grading rubrics.

• Employment type: Contractor, Part-time
• Time commitment: 20+ hours/week
• Pay: USD 110–140 per hour (pay-per-hour)

What you'll do

Your primary responsibility is to ensure AI-produced tax research is technically accurate, current with legislation and guidance, and supported by correct authorities.

• Review UK domestic tax research questions and model answers for technical accuracy and completeness.
• Validate supporting legal authorities, case law, and HMRC guidance cited in model responses.
• Review and improve grading rubrics for technical accuracy, scope, and fairness.
• Rewrite or refine model answers to reflect correct interpretation of UK legislation and recent tax developments.
• Assess whether analyses reflect current UK legislation, HMRC guidance, and recent tax developments.

Requirements

Candidates must meet the stated professional and technical requirements; OpenTrain will verify qualifications and experience during onboarding.

• 5+ years of professional UK tax experience.
• Recognised UK tax qualification such as ACA, ACCA, CTA, Chartered Accountant, Solicitor, Barrister, or equivalent.
• Deep expertise in UK domestic taxation and experience interpreting UK tax legislation, HMRC guidance, and case law.
• Experience preparing technical tax opinions, memoranda, or compliance documentation.
• Excellent written communication, analytical skills, and attention to legal detail.
• Fluent English and ability to work remotely from the UK (candidate must be located in GB).

Helpful background

The project will value practitioners with exposure to a range of UK tax areas. These are not strict requirements but indicate the kinds of experience that will help you succeed.

• Corporate tax, personal income tax, capital gains tax
• VAT, employment tax, stamp duty
• Tax controversy, HMRC advisory, or litigation experience

How it works / next steps

Apply through your OpenTrain account. If invited, you'll complete a short onboarding and qualification check to confirm your tax credentials and domain fit.

Tasks are performed through OpenTrain's project workflows and annotation tools; typical label types for this role include evaluation/rating and text generation on text-based research content.

• Data type: Text. Label types: EVALUATION_RATING and TEXT_GENERATION.
• Language: English. Location requirement: United Kingdom (GB).
• OpenTrain AI is the hiring and contracting organisation for this role.