Hi Mehran Iqbal
Please see the guidance at:
Find out how to register as a professional tax agent with HMRC Section 2 Charities regarding applying online for an agent reference number or customer account reference number.
If you wish to receive emails from GOV.UK then click on the “Bell symbol Get emails about this page” above the contents for a particular page. Alternatively you can follow the same process from
HMRC services for tax agents. This will allow you to subscribe to that particular page and others as part of your subscription.
Thank you.