Can I still file electronically if I'm late? Also I did not file an extension

[xmasbaby0]

You can still e-file a 2018 tax return until October 15, 2019; after that you would have to print, sign and mail it.  If you are getting a tax refund there is no penalty for filing late.  If you owe tax due for 2018, though, you can expect a bill later from the IRS for the penalty and interest you will owe for filing past the deadline.  TurboTax will not calculate that--the IRS will calculate it based on when they receive your return and payment and on how much you owed.