Best Free US Tax Calculator

hey dudes

i am looking for suggestions for the best free US tax calculator that can ideally also calculate state taxes. Robust output is ideal.

in canada we have this…

https://www.taxtips.ca/calculators/canadian-tax/canadian-tax-calculator.htm

Anything in the US like this?

tanks!

I would start with the Federal Form 1040.

https://smartasset.com/taxes/california-tax-calculator

here you go for cali.