Most likely it means that they are still processing your return and does not mean there is anything wrong.
Here is the process that all returns go through:
Pending: https://ttlc.intuit.com/replies/4193097
Accepted (this is the last update that TurboTax will get from the IRS): https://ttlc.intuit.com/replies/3958820
Processing (the IRS does not inform TurboTax of this stage): https://ttlc.intuit.com/replies/4689484
Most likely it means that they are still processing your return and does not mean there is anything wrong.
Here is the process that all returns go through:
Pending: https://ttlc.intuit.com/replies/4193097
Accepted (this is the last update that TurboTax will get from the IRS): https://ttlc.intuit.com/replies/3958820
Processing (the IRS does not inform TurboTax of this stage): https://ttlc.intuit.com/replies/4689484