Customer Account Services Customer Account Services 1Accounts Management and Compliance Services Operations <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 2Systems and Research Programs <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 3Taxpayer Contacts <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 4Refund Inquiries <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 5Account Resolution <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 6Individual Tax Returns <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 7Business Tax Returns and Non-Master File Accounts <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 8International <xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include><xi:include></xi:include> 10Quality Assurance <xi:include></xi:include> More Internal Revenue Manual