Expenses - Work place
I work for a company (W-2 based on California taxes) based in California.
Currently I work 2 weeks from home based in Virginia and on-site at
their new plant in South Carolina for 2 weeks.
I also pay for my expenses ( Car + Hotel ) during the time I work on-site from
my own pocket.
How do I claim my expenses and file my taxes?
Do I need to file taxes in all 3 states even though the company is based in California?