Self Assessment: online technical support
Use the online forms or call HMRC for help with filing your Self Assessment tax return online, or if you have lost your Government Gateway user ID and password.
Online
Get help with problems signing in
Find out what to do if you’ve lost your:
- user ID
- password
- activation code
You can check your tax records online, tell us about a change to your personal details and more in:
Another way to find answers to your questions is to chat with HMRC online.
Phone
Call HMRC to get support with:
- problems logging on or registering for an online service
- problems submitting forms
- error messages in your online account or on HMRC forms
- downloading and using HMRC free software and tools
You can also call if you need extra support because your health condition, disability or personal circumstances make it difficult for you to use HMRC online services.
Find your Unique Taxpayer Reference (UTR) and have it with you when you call.
Before you call, you can find out how to:
- file your Self Assessment tax return online
- use helpsheets to help you complete your Self Assessment tax return
Call waiting times vary and can be up to 45 minutes.
Telephone: 0300 200 3600
Textphone: 0300 200 3603
Outside UK: +44 161 930 8445
Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays.
Related content
File your Self Assessment tax return online
Self Assessment tax returns