Open the "Business" section of your return and let the program walk you through the steps. Under "Business Income and Expenses," you will be able to put in all of your income and expenses for the first company. You will be able to report that the business was closed and the date.
THEN, you can add another business (the one using your EIN) and input all of the information for that business.
If some or all of your employees worked for both businesses, you will need to issue each of them TWO 1099-MISC. The first one would be income from January to November (using your SSN) and the second would be for the time you were using your EIN.
