Why does TurboTax say my tax return has been accepted, but the IRS website does not show that it has been received?

TurboTax may say your tax return has been accepted because they have processed it on their end, but the IRS website may not show it as received yet because there can be a delay in updating their system. It's common for there to be a lag between when TurboTax processes your return and when the IRS updates their records.