To enter hobby income, in the Search box type "hobby expenses" (without the quotes), then click the link that says "Jump to hobby expenses." (I know you are entering hobby income, not expenses, but this is the simplest way to get to the right place. Hobby income and expenses are on the same screen.) When you enter it this way it will not ask for an EIN or SSN.
Did you enter the income as a 1099-MISC, even though you didn't receive a 1099-MISC? That could be why it's asking for an EIN or SSN. If that's what you did, delete the 1099-MISC that you entered.
You cannot report hobby income in TurboTax Free Edition. You will have to upgrade to Deluxe, or you might be able to use the IRS Free File Program delivered by TurboTax if you meet the requirements.
