The IRS only receives the Schedule A, not the worksheets.
You do not need to attach any worksheets to your tax return when you e-file. If you are itemizing, only the Schedule A will be sent to the IRS. However, you should keep all your paper work including all the Form 1098's and worksheets in a place where you can easily find to present when IRS contacts you for proof.
Also note that your mortgage interest might not change your total tax refund. It will only change if your total itemized deductions including the mortgage interest exceeds your standard deduction. In the TurboTax program, when you enter itemized deductions such as mortgage interest, property taxes, medical expenses, charitable contributions, all of these items are added together. Unless the total of itemized deductions exceeds the standard deduction for your filing status, you would not see any change in tax due or refund.
@dhagen
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