Internal Revenue Service http://www.irs.gov/
Pa Dept of Revenue http://www.revenue.state.pa.us/portal/server.pt/community/revenue_home/10648
Berkheimer Associates http://www.hab-inc.com/content/
Central Tax Bureau http://www.centaxgroup.com/
National Association of Enrolled Agents http://www.naea.org/taxpayers/what-enrolled-agent/
Quickbooks http://quickbooks.intuit.com/
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