A special legislative committee has been assigned a task that one of its chairmen admits is too big to tackle right now. The Joint Committee on Tax Policy has beenformed to review the entire state tax structure. Co-Chairman Michael Gibbons, a State Senator from Kirkwood, says it might well be a big task, but it is one that needs to be tackled. Yet, Gibbons says that’s too big a task to take on with only a month left before the regular legislative session begins. He says the committee will, instead, focus on a review of the state’s tax credit programs to ensure they are providing the economic stimulation they were intended to provide.