Your e-filed return is still in pending on the server because the IRS is currently accepting/rejecting/processing returns. Sometimes it can take more than 48 hours to process. Only a few returns were accepted early in a test batch. Everyone else has been waiting. Please see the TurboTax FAQ below for more information on pending returns:
https://ttlc.intuit.com/community/return-status/help/what-does-pending-mean/00/26331
Once your tax return has been submitted, the most up to date information will come from the IRS.
It can take anywhere from a few days to 3 weeks to update. Until the IRS starts processing it on their own, you may not find record of it or the website may say that you have put in incorrect information when tracking your federal refund. As your return moves through the system, the status of it will be updated accordingly. Continue checking the Where’s My Federal Refund? tool for updates.
Please see below for more information on what accepted means:
https://ttlc.intuit.com/community/return-status/help/what-does-accepted-mean/00/26285
Per @ KatrinaLO
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