@shangxinwulei
To answer your questions:
1. Any income you earn from work you performed from a location in VA is taxable by VA, regardless of the employer's location. (The only exception is if your residence is in a reciprocal state, which WA is not.)
2. Any stock-related compensation you earned is taxable by VA if the compensation is related to work performed in VA.
3. Regardless of its source, the bonus you received after becoming a resident of CA is taxable by CA.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
