Self assessment registration

Hello. I came to the UK last year and then became a tax resident. I don't have any UK incomes but foreign incomes/gains, so I tried to do a self assessment registration. But your system reported that the information I gave did not match your records. What the information I gave are my name, DOB, NI (which I don't have) and postcode. I don't think there is any inconsistancy. Would you please advise how I can register? Cheers.

Hi echow,
If your form is being rejected please complete the fill in, print and post form:
Fill in, print and post the form
Thank you. 

Hello. As per your advice, I filled in the form, namely, "Registering for self assessment and getting a tax return" and posted it on 30 Aug 2023. However, I have not yet received any reply from HMRC and the deadline of self notification of 5 Oct is close. Would you please advise what I should do? Cheers.

Hi echow,

You would need to contact HMRC to check on the progress. Self Assessment: general enquiries

Thank you.