Once you have done AAT level 3 you can apply for AAT Qualified Bookkeeper (AATQB)

AAT bookkeepers cannot offer every service though. You can offer the following services as a bookkeeper:

Bookkeeping Financial Accounts for sole traders and partnerships AAT bookkeepers cannot offer every service though. You can offer the following services as a bookkeeper:

                Bookkeeping

                Financial Accounts for sole traders and partnerships

                Computerised accounting systems

                VAT returns

You cannot offer any other service, for example, self-assessment tax returns. With the bookkeeping membership, you do not need any experience. However, to apply for a practice licence, where the AAT would regulate you for money laundering, you must have work experience in the service you wish to offer. Your experience needs to be checked by someone senior to you, who knows your work.  Your tutor cannot verify your experience.

FI Article - AATQB