@Tobie ann
Don't know what you think you saw, but there are NO second 2018 extensions. If you think you saw a way to get a second extension past October 15, 2019, you misunderstood.
If you are getting a tax refund, there is no penalty for filing late. You have up to three years from the filing deadline to get your refund.
If you owe, you are late if you do not file by the deadline and you are subject to late filing penalties and interest.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
