Hello everyone! I´m a private instrument rated pilot in United States. I´m new in the aviation field, and I recently found myself 500 ft. above the floor of class B airspace without authorization. I was with my instructor practicing some commercial maneuvers. Before landing, the tower controller told me that there was a possible pilot deviation and that I needed to call a number. After landing, I called the number and the lady wrote down my name, pilot number, and phone number and told me that somebody will contact me. I called the same number next day, and they told me that they send the report to the local FSDO, and that somebody will contact me in a few days. What should I expect? What should I do? Did anybody recently have a similar experience? What did you do to solve the problem? Thank you in advance for any comment or suggestion.