As the founder of Best-Assistant Accounting, I, Polina Dimitrova, believe in building genuine, year-round partnerships, providing warm, direct communication and personal support whenever you need it, rather than just at tax time.

Based in Aylesbury, Best-Assistant Accounting is a dedicated AAT certified accountancy practice supporting start-ups, sole traders, and growing small businesses across Buckinghamshire and nationwide. We specialise in taking the stress out of everyday finances, HMRC compliance, and business tax management.

Our approach is built on a personal, direct partnership. You work directly with a qualified, approachable specialist who understands the unique challenges faced by local independent enterprises with no corporate jargon or automated call queues. Whether you need a seamless cloud bookkeeping setup, help resolving HMRC penalty disputes, or ongoing payroll management, we provide clear, reliable financial support designed to help your business scale safely.

Full Range of Services

• Bookkeeping & Cash Flow Management: Accurate, real-time tracking of income, expenditure, and monthly cash flow to keep your business records audit-ready.
• Self Assessment & Tax Returns: Complete preparation and timely filing of tax returns for sole traders, freelancers, and small business owners to maximise tax efficiency.
• Making Tax Digital (MTD) Compliance: Digital record-keeping and direct HMRC submissions using leading accounting software (Xero, QuickBooks, Sage and BrightPay).
• HMRC Representation & Dispute Resolution: Expert support in handling HMRC correspondence, clearing backlogs, and appealing unfair penalty notices.
• Payroll & Auto-Enrolment Support: ICB Level 3 certified Payroll management, CIPP associate ensuring accurate salary calculations, digital payslips, RTI reporting, and workplace pension compliance.
• Start-up Setup & Business Growth: Guidance on business structure, opening separate business accounts, and setting up efficient digital record-keeping from day one.

Mentoring & Practical Training

Beyond standard practice services, Best-Assistant Accounting offers structured, one-to-one mentoring and practical CPD-aligned training programmes. Designed specifically for accounting students, aspiring bookkeepers, and small business owners looking to master their own numbers, our training bridges the gap between textbook theory and real-world application.

• Software Training: XERO Certified Adviser and hands-on navigation of essential UK accounting platforms including Xero, QuickBooks, Sage,FreeAgent and BrightPay.
• Practical HMRC Processes: Step-by-step guidance on filing MTD returns, managing RTI payroll submissions, and maintaining statutory compliance.
• Business Mentoring: Tailored guidance for launching and structuring an independent bookkeeping practice or improving internal financial management.

To discuss your requirements or book a consultation, contact us by phone at 07961638958, email at office@best-assistant.com , or visit https://best-assistant.com/.

Whether you are based in Aylesbury or anywhere UK nationwide, we look forward to supporting your business.

Polina Dimitrova (AAT, ICB, CIPP)

Founder Best-Assistant Accounting

Xero Certified Adviser