Hi,
We cannot provide an in depth response on this forum, you should write into the department for a liability decision for both tax and National Insurance contribution (NICs) payments. Depending on your circumstances you may be required to pay both employers and employees NICs as well as tax on your UK income.
You can see information below if there is no UK company and so they are unable pay you via their payroll:
PAYE20100 - Employer records: set up employer record: DPNI scheme - direct payment (tax and NIC)
For a liability decision please write to:
PT Operations North East England,
HM Revenue and Customs,
BX9 1AN
Please include the following:
full name, National Insurance Number, date of birth, date you left/arrived in the UK - if applicable, most recent UK address, address abroad – if applicable, type of work you undertake, company name and address – UK and abroad, where your contract is held, how often you work in the UK, your normal working pattern (the days, weeks or months you regularly work).
Thank you.