Your answer is incredibly helpful. Thank you so much! Just a follow-up question:
You mentioned that I'd want my employer to withhold taxes for both PA and CA if my income is indeed taxable by both. But I'm wondering, is it possible (or better) to withhold just the PA tax? Withholding both states would result in a bigger tax return next year, but withholding extra money for CA would mean less opportunity to invest or put in savings for interest. Feels like I'm losing potential money by withholding for two states.
