After you file

You didn't say what this efile status check tool showed.  I assume it will say accepted, since you said you received your state refund, which implies the Federal return was also accepted.
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp

When using the Where's My Refund tool, look at your actual 2018 return to get the federal refund amount.  Be sure you are using what is displayed on your 1040, Line 20a for the Federal refund amount.

Use only the Federal refund amount.  Do not use any combined total figure that includes the state refund.

And if you are paying your fees out of the Federal refund, use the Federal amount without regard to the fee subtraction; i.e., the amount before any fees are subtracted.

You can phone the IRS to see if you can learn anything about your return.

IRS:  800-829-1040  hours 7 AM - 7 PM local time Mon-Fri

Listen to each menu before making the selection.
 
First choose your language. Press 1 for English.

  • Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.
  • Instead, press 2 for "personal income tax".
  • Then press 1 for "form, tax history, or payment".  
  • Then press 3 "for all other questions."
  • Then press 2 "for all other questions."  It should then transfer you to an agent, but there is likely to be a long wait.
I usually use a speakerphone so I can work on something else while waiting.

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