Extension must be filed by the deadline too. So it's too late
Just get it done and e-filed as soon as you can. IF you have a refund, there's no penalty. If you owe a balance due, the penalty/interest wouldn't be too bad if you don't owe too much extra anyhow....and you get it in the next couple weeks
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
