I'd be willing to bet that when you used Jackson Hewitt you had them take all their fees from your refund or you got a Refund Anticipation Loan (quick refund). In either case they created a temporary account in THEIR bank which is where the IRS would have deposited YOUR refund. That bank would then take out their fees and then Direct Deposit your share into your bank.

Since the IRS did NOT make the deposit to YOUR account, they'll send you a check.

Most everyone who used a tax service has this situation. The only way you would get direct deposit of the rebate is if you had paid ALL fees up front and not received a RAL. Use the chart for a mailed check date for your SSN.