Google actually has a special search for polling places, which is probably the easiest.
The state tells you this: Election Day voting hours are 7:00 a.m. to 7:00 p.m. at all polling places statewide. For questions regarding polling places, always consult your County Elections Office. *Your voting precinct number (Pct. No.) is located next to your year of birth on your voter registration certificate.
We will have someone on the phone during the voting hours on Election Day, so if all else fails, call 512-551-0310. If you get voicemail we will get back to you asap. We only have one line.