First time registration for self-assessment - how long to process application?

How long should it take to get a response after registering for the first time for self-assessment? After many years of working overseas, I registered for the first time - online - for self-assessment a few months ago, but have heard nothing back. This is to pay some tax on savings for last year. How long should I expect before receiving notification from HMRC that I am registered?

Hi 

You would normally receive your UTR and confirmation of your registration in around 3 weeks.
In this case, there may have been an issue with your registration - contact us by wechat or phone via
Self Assessment: general enquiries, and we can register you if necessary.

Thank you