Clare Halligan
People

Clare Halligan

Director

Areas of expertise

Tax disclosures; tax investigations; tax disputes; mediation 

Experience

Clare works in our Tax Dispute Resolution team, helping people and businesses resolve contentious tax matters with HMRC. 

Where a tax error has been identified, Clare and her team help clients make voluntary disclosures to HMRC through either the Worldwide Disclosure Facility, HMRC's Digital Disclosure Service or through the Contractual Disclosure Facility (COP 9). 

Clare also supports clients navigate HMRC enquiries and tax investigations up until conclusion. Her enquiry experience covers personal tax enquiries, tax investigations (COP9 and COP8), corporate enquiries such as Patent Box and R&D tax credits, cross tax enquiries and Partnership enquiries. Where a tax dispute unfolds, she also has mediation experience (ADR). 

Professional qualifications/membership

  • Chartered Tax Advisor (CTA)
  • Trust and Estate Practitioner (TEP)
  • Member of Chartered Institute of Taxation (CIOT)
  • Member of the Society of Trust and Estate Practitioners (STEP)
Corporate Taxes And Reporting

Article

Tax Update February 2026

The latest tax update and VAT round up for the month.

London cityscape

Article

Sustaining success in fast-growth businesses

How Britain’s most exciting businesses overcome complexity to continue growing: Read the executive summary of Professor Dylan Jones-Evans' report from the UK Fast Growth Index, sponsored by S&W

Contact Clare