I've never been to a show or fair where professionally quilted quilts are entered in the same category as amateur quilted quilts. I am the Superintendent for the fair in my county. There's a whole section for professionally quilted quilts and we're going to expand that section this year.
The tag on the quilt has the section number and the class number. To find out what those numbers mean you just need a fair booklet that's available at several places in town.