I had a business I ran as a sole proprietor for about 4 years that hadn't made too much and was not a problem to add to tax returns as it was only 1099-MISC income. It has since changed and is the main and only source of income for me. I registered the business as an single member LLC a year ago and requested an EIN a few months ago. I just submitted 2016 taxes using only my SSN, filing under a 1040 on the Schedule C, and did not include the EIN on there. The main reason I got the EIN was so that when I receive various 1099s the individuals and companies do not have my SSN. I must now submit quarterly tax payments which, since I filed under my SSN for 2016, shows that I must file quarterly with the SSN and cannot use the EIN. Should I forget about the EIN entirely, as the only point was to use it when individuals request a W9? Or can I still use it for that as it is connected to my SSN? I'm just afraid that if I pay my quarterly and annual tax returns with the SSN and use the EIN for individuals giving me a 1099, that could create a problem.
