I am picking up M3 in Fremont this Saturday morning. Which parts do you want details about? What I can tell you is the following. The CA Fee site posted is useful but not exact. A few months ago for MX it was a good sanity check but did not correspond exactly to the final Tesla agreement. What is certain is the sales tax amount. Go to this site and enter your address.
https://maps.gis.ca.gov/boe/TaxRates/ This is the tax you should be charged, and if Tesla docs show otherwise you can notify them and they will fix it (done for me in 2013, automatically correct in 2017 and 2018). Once you can see your amount due on M3 My Tesla site, it only shows combined taxes and fees. Take your taxes from above step and add 1 cent (no kidding, this was true for both our MX and M3) and subtract this from the rest to see your total registration fees. If you want further detail, email your delivery associate and you can get the full breakdown to see taxes plus all registration and misc fees. That should match the forms you will sign at delivery.
Good luck and congratulations!