I never received my federal tax return, but I did receive my state. What do you think happened?

[Bsch4477]

https://www.irs.gov/refunds

[DoninGA]

Once a tax return has been Accepted by the IRS or a State, TurboTax receives no further information concerning the tax return or the status of any tax refund.

If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds