As you said, the income belongs to your daughter, not to you. You do not include it on your tax return. If the Social Security benefits are your daughter's only income, she is not required to file a tax return. If she does not file, her benefits do not have to be reported anywhere. If she files a tax return for any reason, she has to include the Social Security benefits on her own tax return.
If there is any federal tax withheld in box 6 of your daughter's SSA-1099, she would want to file a tax return even if she is not required to file, in order to get a refund of the tax that was withheld.
