Tax Administration Assistant

Simmons Gainsford is a leading London-based accountancy and business advisory firm, providing expert services across tax, audit, accounting and business consulting. As part of the rapidly growing Sumer Group – one of the UK's fastest-growing accountancy networks – we combine the personal, relationship-driven approach of an independent firm with the scale, opportunities and resources of a national organisation. At Simmons Gainsford, we work with a diverse portfolio of entrepreneurial, owner-managed and privately owned businesses across a wide range of sectors. Our clients share a common ambition for growth, and we pride ourselves on helping them navigate complex tax, financial management and compliance challenges through tailored, commercially focused advice. Building long-term, trusted relationships is at the heart of everything we do. Our collaborative culture, technical expertise and commitment to exceptional client service make Simmons Gainsford a great place to build a rewarding career. The Opportunity As a Tax Administration Assistant, you will become an integral member of our friendly and supportive Tax team, providing administrative assistance across a broad range of tax matters while gaining valuable exposure to the profession. This role offers an excellent foundation for someone who is organised, eager to learn and interested in developing a career within tax and professional services. This is an exciting entry-level opportunity for someone looking to start a career in tax and professional services. Simmons Gainsford will provide full training, support and development to help you build a successful long-term career. Key Responsibilities Provide administrative support across the Tax team, including assisting with and overseeing AI-driven automation processes Supporting the team with client onboarding, ensuring a smooth and efficient process for new clients Assisting with billing and financial management, helping to maintain accurate records Liaise with HMRC regarding clients' tax affairs and correspondence Support the preparation, organisation and maintenance of client records and documentation Assist colleagues with ad-hoc queries, projects and process improvements Build positive relationships with clients and colleagues, ensuring a high standard of service is maintained Monitor deadlines and ensure administrative tasks are completed accurately and efficiently Contribute to the continuous improvement of team processes and ways of working Skills, Knowledge & Expertise Excellent verbal and written communication skills Strong IT skills, with confidence using Microsoft Office and learning new systems Highly organised with strong time management skills and the ability to prioritise workloads Excellent attention to detail and accuracy A proactive and positive approach, with a willingness to learn and develop Strong team-working skills and the ability to build effective working relationships Belong @ Sumer At Sumer, we know everyone’s journey is different. That’s why we’re committed to fairness, removing barriers, and giving people the support they need to do their best work. If you need any support during the hiring process, just let us know. Our values represent what matters most to us and guide how we work every day: We Shine Together We Do the Right Thing We Make It Count We know diverse teams make us stronger. That’s why we’re creating an inclusive workplace where everyone belongs and differences are valued and celebrated.