Hi Steffen KOCH,
• you can try to self-serve at
HMRC online services: sign in or set up an account
• to sign in with their User ID and Password
• select the link
'Problems receiving this code' then
'you can get help’
• to follow the online prompts
• when they make the request online Gov.UK will issue an email to them and the selected administrator
• once the reset has been performed with Group management new confirmation emails will be sent to them and the selected administrator
• they can then update the way they get their access code the next time they sign in
OR
You can contact us through webchat
Technical support with HMRC online services
OR
If you cannot use a telephone and need a different way to contact HMRC
Get help from HMRC if you need extra support
Thank you.