@howjltx1 wrote: "One other question I have is the company is saying we may need to go to California for a few months on a business trip, is there a point California will begin charging state income tax?"
Yes. Non-residents of California with California-source income must file a non-resident California tax return (CA Form 540NR) if their income exceeds CA's filing threshold for their particular filing status. The portion of your salary that you earn from work you actually (physically) perform within California is California-source income. The filing thresholds are based on income earned, not on number of days spent in California.
You can see CA's filing requirements and threshold amounts for tax year 2022 in this reference:
https://www.ftb.ca.gov/file/personal/residency-status/part-year-and-nonresident.html
>You will note that one of the threshold tables is based on your total worldwide income.
The reimbursement you receive for your business expenses is typically not taxable, but your salary of course is taxable.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
