I believe I may have made a mistake on my EIN application. At the time that I completed the form, I was advised that the "start date" requested in the application needed to match the date I filed the articles of organization officially forming my LLC (eg. I filed articles of organization with my state in July 2013, thereby making "July 2013" my start date for EIN application purposes). However, I began as a sole proprietor, doing the same work I will do with my LLC, in March 2013. Which date should I use as my business entity "start date" for IRS/EIN purposes--March 2013 or July 2013? Thank you so much for any information you can provide.Additional info: I started this work, on a consultative basis, in October 2012. My earliest contracts were largely pro bono however--because I did not receive pay for my services until March 2013, I did not think October 2012 would "count" as far as the IRS was concerned. Legally speaking, is there a hard and fast definition that governs the "start date" of a business? In my example, did I "start" in October 2012, March 2013, or July 2013? Thank you!