This, in theory, should reduce the cost to callers of hanging on the telephone.
The new prefix began roll out on 16 April, starting with new numbers for the child benefit and guardian's allowance helplines.
The 0845 numbers will still work for around 18 months.
There is further information at HMRC.
The deadline for the full roll out is expected to be by the end of summer.
Tax does have to be taxing.
Professional Cover Against the Threat of Costly TAX and VAT Investigations
Insurance to protect you against the cost of enquiry or dispute with HMRC is available from several sources including Solar Tax Investigation Insurance.
Ken Frost has negotiated a 10% discount on any polices that may suit your needs.
However, neither Ken Frost nor HMRCISSHITE either endorses or recommends their services.
What is Solar Tax Investigation Insurance?
Solar Tax Investigation Insurance is a tax-fee protection service that will pay up to £75,000 towards your accountant's fees in the event of an HM Revenue & Customs full enquiry or dispute.
To find out more, please use this link Solar Tax Investigation Insurance
Tax Investigation for Dummies, by Nick Morgan, provides a good and easy to read guide for anyone caught up in an HMRC tax investigation. A must read for any Self Assessment taxpayer.
Click the link to read about: Tax Investigation for Dummies
HMRC Is Shite (www.hmrcisshite.com), also available via the domain www.hmrconline.com, is brought to you by www.kenfrost.com "The Living Brand"