How to find property taxes

[Michael Faudoa]

I am a new investor, and my agent sent me a duplex that shows some promise. I want to plug the numbers into the BP rental calculator, but I can't find the property tax. The listing is not public so I can't use realtor.com, Zillow, etc.

I tried going to my county assessor's website, but it is extremely cumbersome to navigate. I am wondering if there are other ways I can locate the property tax bill on my duplex? 

Thanks so much!