My Fed acceptance date was 2/12, filed electronically, My "IRS Where's my Refund" says to expect direct deposit around Mar 4th. It's now the 17th. Is this still ok?

The IRS issues refunds, not TurboTax. This means that we can't say for sure why you haven’t received your refund if it's been longer than 21 days since you e-filed. You'll have to speak directly to IRS to find out more about the delay.

• When to contact the IRS
• What makes refunds late?

Perhaps you had a Refund offset.  The IRS may have discovered you have delinquent debts, which they're legally required to deduct from your refund. You'll receive a notice about the offset.