I have seen this many times. Many people use don’t with “he” and “she”.
Can we use “don’t” instead of “doesn’t”?
You are correct.
The third person singular of the verb to do in the Simple Present Tense is does and the negative is doesn’t.
Sometimes people say he don’t or she don’t in very colloquial English or slang language but it is grammatically incorrect and not used very often.
The right answer is: she doesn’t need your advice.
Recommended for you:
How do I use “do” and “does” in a question
What does “DO OVER SOMEONE” mean?
‘Neither do I’ vs ‘So do I’
12 (All) English Tenses with Examples