When I was 13 (2005) my family moved to the UK. I started working at 18 (2010) and had never filed a US tax return until I moved back to the US at the end of 2018. I recently found out that I was supposed to be filing a return every year, and I have no idea where to start.
Do I need to file a return for every year I have worked?
In the UK the tax year runs from the beginning of April to the end of March, so any documents I could get ahold of would show my earnings between these dates, not the calendar year. Will that suffice?