The Pennsylvania Department of Community and Economic Development (DCED) produces a Tax Collector Manual for PA tax collectors. As of this writing, the manual is available from their website at the following URL: https://dced.pa.gov/download/tax-collectors-manual/.
Unfortunately, the state website’s URLs are constantly changing. The above link could go dead at any time. For that reason, I’m hosting a copy of the manual on this site.
To download a copy of the manual, just click on the link at the top of this post or the one below (both links open the same file).