I live in Indian Palms on Sherman. Some of the street signs say Sherman Street and others say Sherman Drive. Which is the correct one according to the post office?

It seems that the Riverside County Tax Collector only recognizes your address when selecting "ST" for the street type. When selecting "DR" for the street type, "No Result Found" is returned. However when running your address through USPS address validation when inputting "SHERMAN ST" it gets converted to "SHERMAN DR". I only tried this with your specific street number so a different street number may return different results but doubtful. Sources: https://ca-riverside-ttc.publicaccessnow.com/PropertySearch.aspx https://tools.usps.com/zip-code-lookup.htm?byaddress

Ether one is good