How do I report my income as a household employee earning just a few hundred dollars?

Please explain what you did as a household employee.   Did you perform work of some kind in someone else's home?   Or did you babysit, etc. for someone in your own home?

I am asking what you did because you did not not earn enough to be considered a "household employee" from whom the employer would have been required to withhold Social Security and Medicare, and issue a W-2.   You might have been an independent contractor, and will need to report self-employment income.   We need more information from you.