ANNAPOLIS The General Assembly likely will return May 14 for a two- or three-day special session on a revenue package including income-tax increases and a shift of state-paid teacher-pension costs onto counties, state officials said Wednesday. Democratic leaders say the extra revenues are needed to bolster the states $35.4 billion spending plan and undo more than $500 million in cuts that went into effect when last-minute bickering caused the assembly to adjourn April 9 without passing two key revenue bills.