If you're here looking up HMRC customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. HMRC also goes by or is associated with the names HMRC.com, Her Magesties Revenue and Customs, HMRC Talk. They are considered to be part of the following sectors and industries: Government, Tax. HMRC is associated with terms like revenue department, private, marketplace, b2c by their customers and industry analysts. Their competition, in the eyes of customers, are companies like There are no competitors to HMRC as it is a government agency and it has no competitors.. They employ 56,000 people according to customers in the know.