Corporate Returns:

Audit rates for largest corporations
Audits of "passthrough entities" (partnerships and S-corporations)
Audits of corporations
Corporate share of federal income tax collections

Individual Returns:

Audits of individual income tax returns
IRS results in document matching and in finding math errors on returns
Growing importance of correspondence audits

Collection Enforcement:

Levies, liens and seizure activity resuming
IRS delinquent return investigations