since the services were performed at her house she is an independent contractor. to take credit, you need her SSN or EIN and need to file a 1099-NEC (a little late was due 1/31 with the IRS) and if she won't give it to you, you're out of luck for taking any deduction or credit.
https://www.irs.gov/pub/irs-pdf/fw9.pdf
in the future you need to get form w-9 for independent contractors and if employed in your home, the probable need to file schedule H, payroll taxes and w-2.
