Русско-англо-русский юридический словарь

tax consultant is a person who advises other people and companies on tax affairs, esp on legal ways of paying less tax (Collins English Dictionary)

A tax advisor is a financial expert with advanced training and knowledge of tax law. The services of a tax advisor are usually retained in order to minimize tax payable while remaining compliant with the law in complicated financial situations. [...] A tax advisor is also known as a tax consultant. (Investopedia)