Deductions & credits

It could be capital gain income or interest income depending on the origin of the income. If it wasn't reported to you on a tax form and you don't know specifics on where the income originated from you can report it as "Other Income". You will find that entry in the Less Common income section of TurboTax, and then Miscellaneous Income, then Other Reportable income.

You have to enter "Yes" to the question regarding Did you receive any other taxable income? Then you can enter the income along with an explanation as to what it is for:

If you paid any foreign taxes on the income, you can see if you qualify for a foreign tax credit in the Deductions and Credits section of TurboTax, then Estimates and Other Taxes Paid, then Foreign Taxes.