Holder's 4G tax lax By ISABEL VINCENT and MELISSA KLEIN Last Updated: 7:24 AM, April 17, 2011 Posted: 3:18 AM, April 17, 2011 US Attorney General Eric Holder and his brother failed to pay the property taxes on their childhood home in Queens, which they inherited last August after their mother died, The Post has learned. And because their ailing mom, Miriam, was already behind on two quarterly tax bills when she succumbed to illness on Aug. 13, the charges went unpaid for more than a year -- growing to $4,146. It wasn't until The Post confronted Holder last week...