I'm attaching links for you that might help, but here's my quick answer. Independent contractor for a tech company--sounds like IT work. You guys don't tend to have a lot of write-offs to offset your income. (I do a lot of IT contractor returns.)
I'm sorry, this is going to hurt--expect that you're going to pay about 40% of your income in taxes. I know, ouch. You'll have self employment taxes of 13.3% (it's usually 15.3% but this it is a little lower.) Then, I'm figuring generally an IT person is in the 25% tax bracket (some are higher). California income taxes max out at 9.3%.
Now that I've sent you into shock--sorry, remember that you've got time to 1. figure out what deductions you can take, 2. work on strategies for lowing your taxes, and 3. plan ahead for paying the taxes. You're smart to ask now instead of waiting until it's too late.
Check out the links, they'll be helpful. I'd recommend that you hire a professional to help you claim every legal deduction that you're entitled to. The first year as contract labor is usually the most difficult tax wise. It will be much easier to stay on top of things in the future.