HMRC Self Assessment: 0870 218 3457

Call the HMRC Self Assessment contact number if you wish to be connected with a HMRC Self Assessment customer service agent. Assistance is available for completing self-assessments, filing current tax returns, calculating taxes owed or refunds to be collected, submitting payments, making changes to a return that has already been filed, and more. Calls to the HMRC Self Assessment phone number can be placed Monday to Friday, from 8am to 8pm, and Saturday from 8am to 4pm.

HMRC Self Assessment Contact Number
0870 218 3457

While most employed UK residents have their taxes collected directly from their pay, others, such as those who are self-employed do not. HMRC Self Assessment contact is recommended for those who need assistance with reporting their income and determining how much tax (if any) that they need to pay. Call the HMRC Self Assessment telephone number to request information regarding return submissions, tax filing deadlines, penalties, and amended returns.