There should by mailing instructions included with the schedules and forms you print out when you get ready to file your tax return prepared in TurboTax. If not, where you mail your federal return will depend on where you live and whether you have a refund or owe taxes. You would have to look on the instructions for your state tax return online to determine where to mail it, or it may be printed on the tax form. You can look on the last page of the instructions for Form 1040 for the federal Form 1040 mailing address.
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