Yes, you should amend. You know that you had extra on the table and you deserve every bit. If the tables were reversed and you owed they would want every little bit. Amending is pretty simple and it has no affect on your current return.
Follow the step by step direction contained in the link below.
https://ttlc.intuit.com/questions/3410543-how-do-i-amend-change-or-correct-a-2015-return-in-turbotax
NOTE: Amended returns have to be printed and mailed. It takes about 3 weeks for your amended return to show up in their system and up to 16 weeks to process.
