Haven’t received UTR

I have registered for a UTR around 2nd January but haven’t received it by post. I can’t find it on HMRC app neither. Due to my work pattern and conditions, I am unable to call HMRC during the telephone line’s opening time. Is there other channels I can follow up my registration? Like by email? Thank you.

Hi,

There is the option to webchat, when you open the link below, if you click on Ask HMRC online, we will check if a webchat adviser is available to chat. 

Self Assessment: general enquiries

Thank you.