The number of official complaints about tax credits has risen almost threefold, new figures show.
In its annual report, the Adjudicator's Office, which handles grievances about HM Revenue & Customs (HMRC), said tax credit complaints increased to 569 during the 2005/06 financial year, up from 195 the 12 months before.
The majority related to disputed overpayments.
The office, led by adjudicator Dame Barbara Mills, said like during the 2004/05 tax year many complaints were generated as a result of computer problems, poor communication and complaints handling and a lack of caseworkers.
"Many complainants come to us because, when something went wrong, or even when they simply wanted mo...