ADP highlighted today its top tax-time tools available on the ADP Accountant Portal, a 24/7/365 online resource that features practice tools, guides and various new resources tailored to accounting professionals.  Now that tax season is here, accounting professionals with small- to mid-sized firms can reference big-firm caliber tools and resources as they help their clients juggle hundreds of critical documents and employee records during a tax season rife with extensive changes at the local, state and federal level.