My mail-in return appears to haven't arrived according to the tracking, no return receipt received, etc. Can I mail my return again (noted 'possible duplicate')? in After you file
If I have not received my refund yet by mail what can I do? I filed in January and still have not received it yet why? in After you file
How do I find out what mailing address I have on file for my state tax return? in Get your taxes done using TurboTax