Do I have to fill out nrl1

I am living abroad and recently started to rent out a property in the UK. I am in the process of sending a paper copy to register for self assessment (I tried multiple times online and it seems that I cannot from abroad) and the estate agent takes the taxes to hmrc already. Is there a reason for me to fill out the nrl1 to send the tax to hmrc myself? Is there another way I need to inform hmrc other than the self assessment?

Hi
The NRL1 is only to stop the tax being deducted at source so it is up to you if you wish to register. as a non resident landlord, the income must be declared in the tax return via self assessment.