Agent Dedicated Line: tax credits
Call HMRC about tax credits if you鈥檙e authorised to act as an agent or tax adviser for your client.
Phone
Call HMRC for help with tax credits if you鈥檙e formally authorised to act on behalf of a client.
Telephone: 0345 300 3943
Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays.
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Updates to this page
Published 14 May 2025