If you are filing online you are using the 2016 product. You can not file past years returns through our online product you would need a copy of our 2015 software. Also you are not able to E file your prior years returns you have to print off and mail these returns.
In order for you to file the current tax year of 2016 you would need to clear and start over.
https://ttlc.intuit.com/replies/4248526
