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The last 3 years would not be affected by a system upgrade.   You can only amend 2016 -2019 currently and after July 15, 2016 can no longer be amended for a refund.

 

I can still open 2012 without any problems.

**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**