May 1977 to present date April 7, 2018. A.D. My own Firm A.L.D. SERVICENTER FEIN 363363294 SEPTEMBER 1988 is a going concern firm in Illinois. For research you may go to the website of the ICPAS ILLINOIS CPA SOCIETY... at the website.... https://www.icpas.org. search for my firm... You may also search for my FILE as student at the student library of the University of ILLINOIS at Springfield, ILLINOIS... I forgot the name of the University Library... Brook.....