No, you can't deduct these payment. You have paid a tax on wages so you would not pay them again. The purpose of Schedule H is to be able to include your tax liability to the IRS on your 1040 rather than having to make quarterly payments. Since you did make them, ignore the Schedule H and enter your payments following the steps below.
In order to indicate the taxes you have paid already during the year for your household employee (or others), you need to:
1. Go to "Deductions + Credits" (on the top bar)
2. Select "Estimates and Other Taxes Paid"
3. Select "Estimates"
4. Under "Estimated Tax Payments", select the first option "Federal estimated taxes for 2014 (Form 1040ES)"
