yes because you need an EIN for any W-2s issued. an SSN will not do for either W-2 or 1099NEC
also if you issue w-2s you must file quarterly or annual payroll tax returns for IRS and perhaps your state.
I hope you have a basis for paying her that $3500. (mostly concerned with the rate of pay/hour and documentation of hours performing services).
see this about medicare and fica taxes
https://www.irs.gov/businesses/small-businesses-self-employed/family-help#Children%20Employed%20by%2...
