As a sole proprietor, your business incomes/expenses are reported in your individual return ( using your SSN and NOT EIN) on schedule C attached to your form 1040. When you prepare your 2018 return TurboTax would have done this for you ( you have to tell the software that you have business income ). In such a case the EIN would be used to report W2s or 1099-misc that you may have used for reporting monies expended on wages for people working for your business and also transmitting and reporting withholding for those people working for you. If you did not have anyone working for your business, then the EIN is not used for any reporting to the IRS. For state purposes, some states issue their own business identification while others use the IRS issued EIN.
From what you have posted so far it does not appear that you have had any of these situations requiring any reporting to the IRS using the business EIN.
