2018 Tax Refund Filing, I filed my Electronic TT on April 12, 2019 getting a refund I called the IRS and they show nothing for me can you please tell why they never received it and now will I have to pay a penalty for it being filed late.

I appear to have the same problem. I tried to check on the status of our refund, only to find the IRS has a verification of non-filing attached to my name. What the heck is going on, TT?

When did you efile?  Was it Accepted?  You can check your efile status here     

https://turbotax.intuit.com/tax-tools/efile-status-lookup/   

Then only the IRS can tell you.  IRS Where's my refund https://www.irs.gov/refunds/

Make sure you are using the refund amount from your actual federal tax return and not the combined amount Turbo Tax showed you at the end.  That was for federal and state combined.

When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc.  what does it say?

IF YOU ARE GETTING A REFUND THERE IS NO PENALTY FOR FILING LATE.  You can still efile until Oct 15, 2019