Before leaving the UK
Make a short list of the questions you want to answer before departure. Check how to get copies of records from the employers and providers you’re leaving behind.
Make a research planLife between the UK and US
A new city. A different working day. A few questions from the life you’re leaving behind. Find a starting point for the move, the arrival and everything you keep in between.
Begin researchingPublic research and a preliminary diagnostic. Filing is not currently available.

One question at a time
Make a short list of the questions you want to answer before departure. Check how to get copies of records from the employers and providers you’re leaving behind.
Make a research planA new job, a new home, paperwork from both places: choose one question to start with. Keep a note of the period and the place it relates to, rather than trying to solve everything at once.
Make a research planAn account, a home or a retirement plan can each prompt a different question. Name the arrangement in your own notes, then identify the record or explanation you need next.
Make a research planA useful next step
Use your own notes. You don’t need to send Treaty your answers or documents.

Use the US–UK diagnostic to organise possible filing-area questions. It asks you to confirm your broad context; choosing countries here does not establish your residence or tax position.
About three minutes. No email, documents or exact amounts required. Preliminary only—not tax advice. This public check does not prepare or file a tax return.
US 2025 / UK 2025–26 synthetic example only. This historical example is not a current-year moving guide.
Moving from the UK to the US: the filing areas to checkAnother direction?