Brett Sullivan

Brett studied accounting and finance and grew up working in and around his family’s accounting firms, where tax season is the family business. What stuck with him was less the numbers than the mess: the tangle of forms, agencies, and deadlines that leaves most people stuck. He is at his best turning that chaos into a clean, repeatable checklist.

A couple of years living in Asia put him in the middle of the expat community and its recurring problems: filing US taxes from abroad, keeping US bank accounts alive, and mail that never stops arriving. He met Justin at Money20/20 Europe, shared the advice that was obvious from inside an accounting family, and together they turned Justin’s one-day domicile playbook into Your Tax Base.

As Co-Founder and COO, Brett runs the operations and compliance behind the service: building the process, keeping every customer’s documentation accurate and audit-ready, and making sure the whole move stays simple and human, with CPAs on the ready when a situation calls for one.

We met at Money20/20 Europe: one of us living the expat problem from the inside, the other from a family of accountants and CPAs. The advice traded that week became a one-day Florida domicile playbook, and the playbook became Your Tax Base.