I am a Spanish national who is resident in Spain. I have signed a contract with a UK employer that will start in August 2022. I will be working entirely remotely in Spain. The employer and their payroll agency have said I need to contact HMRC to obtain an NT PAYE Code and to do it now so that I am correctly set up in their systems so no tax or NIC s deducted from my wages. How do I do that - is there a special form or do I send a letter? I don't have any UK references with the Revenue and do not have a UK national insurance number. Is this something they should be doing rather than me?