If you performed work for your sister's business and she reported your earnings on Form 1099-NEC, then she considered you to be an independent contractor and not her employee. This means that in the eyes of the IRS, you are self-employed and have your own business reported on Schedule C.
That means that you would enter your own address as the address for your business. You would not enter her address or her TIN except for when it is entered on the Form 1099-NEC screen.
When you are entering the information for your business, think about what kind of work you did for your sister's company and what you would consider it to be if you had worked for any company doing that same kind of work. For example, if you were doing bookkeeping, then your business would be a bookkeeping business.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
