HM Revenue and Customs (HMRC) is under scrutiny for causing significant delays in processing tax rebates, with one taxpayer's father waiting over a year for a £153,500 inheritance tax rebate. The delay stemmed from a four-year probate process complicated by financial issues following the taxpayer's mother's death. Despite HMRC confirming the owed amount eight months after the application, two additional months have passed without any further communication, raising concerns about the father's financial situation at age 86. Other taxpayers shared similar experiences, with one waiting over a year for a £3,000 rebate after a redundancy, while another faced a projected wait until February 2027 for a pension-related rebate. Critics, including civil servants, argue that HMRC's service is inadequate and does not reflect its duty to the public.