As SJ has indicated in the link she posted, since you had already filed your Tax Year 2015 Form 1040 return before receiving the additional information in the corrected W-2 and corrected 1099, in order for your filing to reconcile with what has been reported by Scottrade to the IRS, you must file an Amended Return Form 1040X - which can be done using TurboTax.
Note that in your case, using the version you used to file previously, you would want to use this link to get you started:
https://ttlc.intuit.com/questions/2693844-how-do-i-amend-my-2014-turbotax-online-return
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