Started my small family business in 2018, made 80K, have NOT started an LLC yet, no EIN

Looking for some direction here. In 2018, I started working as an independent contractor. I filed regular income taxes (with H&R Block) as married-filing jointly, with schedule C and royalties. No LLC started, no EIN, no employees. Now this year I am breaking 100K, and I wanted to pay some of my children (adults and minors) for secretarial work and other roles that they undertake. Based on my limited research, I need to file 1099's and W-2's for the adult children. Here is my question: Can I do that without starting an LLC and still file as an independent contractor for 2019 taxes? I'm in Pennsylvania if that means anything. Is it too late now in October to issue 1099's for 2019? Thanks!