Are you looking for information on what annual filings are required by churches? Here's a great resource from the IRS, "Tax Guide for Churches and Religious Organizations."
I started using the Zondervan "Church and Nonprofit Tax & Financial Guide" by Dan Busby a few years back. I just ordered the 2011 edition for 2010 tax returns and received it from Amazon. I recommend that every US church own this book as a resource for their church treasurer, administrator, and/or bookkeeper.
This tip sheet from the IRS will assist you in determining the tests that the IRS considers regarding determining if workers are independent contractors or employees.