The FCC now offers partial credit for expired General, Advanced or Extra Amateur Radio licenses. A license that has expired and gone beyond the two year grace period will be canceled in the FCC system. The licensee will not automatically qualify for a new license. At a minimum, previous license holders must take the current 35-question Technician exam at a VE exam session to return to Amateur Radio. The FCC will issue a new call sign and a new license when the Technician exam is passed.
In other words. If you have let your license expire and can produce evidence you were previously licensed, you can take the Technician License test and when you pass it you will regain your General or Extra Class license (with a new callsign)
Go the link below for all the details and get back on the air!