You will file using the 2014 software. You will start with your federal to make the changes, then go to the state. Amended returns have to be printed and filed by mail. It
can several weeks or longer to process them. If you are
due a larger refund than on your original return, your amended return should
only show the difference and you will receive a separate check for it. If
you owe money on your amended return, it will show only the new amount owed,
you will have to mail a check with the return.
How to Amend?
https://ttlc.intuit.com/replies/3288565
