Sometimes refunds are lower than expected if you elect to have Turbo Tax fees deducted from your refund, or if you have an offset. You can see what you are being charged for. Click on Tax Tools from the Menu on the left side in your return. Click Tools then My Fees. This will show you what you are being charged for.
When SBBT receives your refund, they will then take the fees out. Until then, you will have to check with the IRS.
This article will provide information as to why your refund is less
Please use this link to track your refund from the IRS