use form 1099-Div to add the dividends. If you paid foreign income taxes on them, you would also need to add form 1116 if it isn't already in your return.
sorry but if you owe, the IRS can assess a late payment penalty and interest. They can be assessed when any payment for a year's taxes is made after the original due date. There is also interest. Turbotax does not compute these penalties and interest. For penalty abatement, you would need to attach a letter and mail in the amended return providing a reasonable cause for their omission. Interest cannot be abated.
