To transfer residency from Chengdu, Sichuan to Seattle, Washington, individuals must first meet Washington State’s residency requirements. This includes establishing a primary residence in Seattle, maintaining physical presence for at least 25 days annually, and fulfilling tax obligations. They should update their address with the Social Security Administration (SSA) and Internal Revenue Service (IRS), file state and federal taxes as a Washington resident, and transfer driver’s licenses and vehicle registrations. If applicable, visa holders must ensure compliance with immigration status while transitioning residency. Washington does not tax income earned outside the state, but residents must report all income, including foreign-sourced, on state tax returns.

The process is necessary because Washington State defines residency based on physical presence and primary residence, not citizenship or visa status. According to the Washington State Department of Revenue, establishing residency requires intent to remain indefinitely, not just temporary stays. For tax purposes, the IRS mandates that residents file a federal tax return and pay taxes on worldwide income (IRS Publication 501). Data from the U.S. Census Bureau shows that approximately 7.7 million people moved between states in 2021, with Seattle’s population growing by 2.1% annually, reflecting its appeal as a destination for residents. Additionally, Washington’s no- income-tax policy on out-of-state earnings incentivizes relocation, but compliance with residency rules avoids double taxation. Failure to properly transfer residency can result in penalties, such as the 30% withholding tax on unreported foreign income (Internal Revenue Code Section 1441). Thus, adhering to legal and administrative steps ensures seamless transitions while maintaining tax and immigration compliance.