; (2) a thorough assessment of the services that the Internal Revenue Service can co-locate with other Federal services or offer as self-service options; (3) proposals to improve Internal Revenue Service customer service in the short term (the current and following fiscal year), medium term (approximately 3 to 5 fiscal years), and long term (approximately 10 fiscal years); (4) a plan to update guidance and training materials for customer service employees of the Internal Revenue Service, including the Internal Revenue Manual, to reflect such strategy