In 2017, you would have been considered a dual status alien. You would have been required to file a non-resident tax return for the period between January 1 and October 21, that only listed income you earned in the United States. And you would have been required to file a resident return for worldwide income earned after October 21, 2017. You also owed a resident return for 2018 and 2019, that reported and paid tax on all your worldwide income. You would get a credit for taxes paid in other countries.
