How can I check if TurboTax sent my 2018 by efile and that the irs received it

[DoninGA]

To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/

Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show.  Click on 2018

The status of the federal tax return will be shown.  If the status is Accepted then the federal tax return was e-filed and received by the IRS.

[VolvoGirl]

For 2018?  When did you file? You had to file 2018 before last October 2019.  If you think you did it online this year you have a problem.  Online is only for 2019 and you can not efile 2018 anymore.