I don't think so. If double, your extension request will probably reject because there is already an extension.
If you owe additional tax, that must be paid by May 17. A extension is just to file not, not to pay. If you are getting a refund then there is no penalty for filing late (the penalty is you don't get yiur refund until you file).
**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.**
