Single dependents—Were you either age 65 or older or blind? No.
You must file a return if any of the following apply.
1. Your unearned income was more than $1,100.
2. Your earned income was more than $12,200.
3. Your gross income was more than the larger of—
a. $1,100, or
b. Your earned income (up to $11,850) plus $350.

Yes.

You must file a return if any of the following apply.
1. Your unearned income was more than $2,750 ($4,400 if 65 or older and blind).
2. Your earned income was more than $13,850 ($15,500 if 65 or older and blind).
3. Your gross income was more than the larger of—
a. $2,750 ($4,400 if 65 or older and blind), or
b. Your earned income (up to $11,850) plus $2,000 ($3,650 if 65 or older and blind).

It depends if she is older or younger than age 65.

Single dependents—Were you either age 65 or older or blind? No. You must file a return if any of the following apply.

1. Your unearned income was more than $1,100.

2. Your earned income was more than $12,200.

3. Your gross income was more than the larger of— a. $1,100, or b. Your earned income (up to $11,850) plus $350.

Yes. You must file a return if any of the following apply.

1. Your unearned income was more than $2,750 ($4,400 if 65 or older and blind).

2. Your earned income was more than $13,850 ($15,500 if 65 or older and blind).

3. Your gross income was more than the larger of—

   1. $2,750 ($4,400 if 65 or older and blind), or

   2. Your earned income (up to $11,850) plus $2,000 ($3,650 if 65 or older and blind).