Congratulations on passing all these exams and joining as a full Member of ICB.
Your ICB qualifications in payroll an self assessment tax (together with the Practice Licence) mean that you can act as a Tax Agent on behalf of clients.
Please visit this page of the website:
to find out about how to register for the different HMRC services. There's no charge.
There's also lots of useful information in the 'Running a Practice' section of the website (under the 'Resources' tab)
including a page on HMRC toolkits and guides so you have easy access to all of HMRC's most useful content for Agents.
Don't forget there's also a Corporation Tax module at level 4. Something to work towards!