AMMS

Hello HMRC Admin. My wife and I intend on moving to Spain. I'm a British Citizen but will obtain Spanish residency. My wife is a Spanish Citizen with UK Settled Status. Our plan is to move (to live and work in Spain for a UK company remotely) in June 2025, however when filling in the P85 form, we can only specify a date in the past. In this case, should we make the move and then fill out the P85 form, to stop paying UK tax? I'm assuming, as we only become officially tax resident in Spain after 183 days in the calendar year, we have a few months for the forms to be processed. Is that the correct process?