Yes, I tried entering my social security number and I also tried entering the EIN, however it still would not accept it. It also said that if my number is not 12 digits that I should leave it blank, but when I leave it blank it asks me to fill it in. So, another post with a similar question pertaining to Hawaii (where I am located) explained that they updated something in 2017 which requires me to apply for another number, and that's the number I need to submit. For future reference, follow this link and path to apply for said number:
hitax.hawaii.gov>Services:Register New Business License>BB-1 Basic Business Application>choose self-employment type of business (Sole-Proprietor, Single-Member LLC, etc.)
