In order to provide you with a 10 digit number, our SMS vendor Twilio requires that we collect your EIN upon signup. Twilio compares your EIN with the other provided business information (address, website, etc.) to ensure the validity of your business. This is in an effort to reduce SMS spam campaigns and is in accordance to a2p 10dlc regulations.  

Sheet Gurus is supportive of this -- our goal is to provide the easiest possible SMS texting solutions for businesses and seeks to avoid spam messages however possible.  Additionally, we handle the complexities of registering your businesses so you don't have to!.