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HMRC internal manual

Self Assessment Manual

SAM70110 - Manage work: customer service: online services helpdesk

The contact telephone number is

Online Services Helpdesk: 0300 200 3600

The Online Services Helpdesk is available on

  • Monday to Friday 8am to 6pm
  • Closed weekends and bank holidays

Textphone: 18001 0300 200 3600