It sounds like your federal tax return was accepted, but the refund amount has not been approved. That means that the IRS has accepted the return and you must wait until they approve the refund.
The IRS has published an update that taxpayers claiming the Earned Income Tax Credit (EITC) or Additional Child Tax Credit (ACTC) can expect their refund by March 3. This may be impacting your refund if you claimed these credits.
You can also use the IRS Where's my Refund? tool to check on the status.
