I'm in an F-1 status. I am working as a church musician and was in and out of a cpt authorization for this work a few times during last year. I was given a 1099 form to file the taxes last year for it, and I did file them, however most part of the earnings was under the authorized employment. My question is how possible it is that USCIS will find out about this times of unauthorized employement? Also I wasn't able to find any information on how USCIS can actually find any unauthorized student employment? My SSN has no record of the employment which was on 1099, as I was told, and the tax papers I filed do not specify the dates I got this salary for,as I remember. What would be the future consequences of this part-unauthorized employment?