You can't include her 1099-B on your return. In fact, you can only report her unearned income on your return if the only income she had for the year was interest, dividends and capital gains distributions (reported on a 1099-DIV).
See Figure 1 of this link, under Can
You Include Your Child's Income On Your Tax Return? Also, see page 9 of
this link, Parent’s Election
To Report Child’s Interest and Dividends.
Instead, your child has to file her own tax return, but her unearned income will be taxed at your rate, also known as the Kiddie Tax.
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