How will I know if I’ve been successfully registered for Self Assessment by HMRC?

Once you are successfully registered, HMRC will send you a letter with your Unique Taxpayer Reference (UTR). In some cases, HMRC will want additional information to complete the registration. In these rare scenarios, the turnaround time tends to be 4-8 weeks. Unfortunately, there is no way to determine if a case will fall into this category at the time of application. some scenarios we might not be available to register for self-assessment