She must file a return if any of the following apply.
• her unearned income was over $1,100.
• her earned income was over $12,550.
• her gross income was more than the larger of—
• $1,100, or
• her earned income (up to $12,200) plus $350.
even if not required to file, if there were withholding taxes she must file to get them back
Yes, she can file her tax return and indicate on the return that she can be claimed as a dependent.
She must file a return if any of the following apply.
• her unearned income was over $1,100.
• her earned income was over $12,550.
• her gross income was more than the larger of—
• $1,100, or
• her earned income (up to $12,200) plus $350.
even if not required to file, if there were withholding taxes she must file to get them back