Sounds to me like you need to talk to a CPA yesterday, if not sooner. Generally, some type of corporation is established "BEFORE' accepting any type of investment income for your type of "activity". I put that in quotes, because the fact is, you don't yet have any activity. Generally, an S-Corp is formed and all investment income from others, as well as from the business owner is income to the S-Corp one way or another. I can go on and on, but I'd end up writing a novel. You ***NEED*** to talk with a CPA and do so ASAP this close to the end of the tax year. This is doubly important if your state also taxes personal income.
If you can't do this, then you need to return all investment income to the investors before the end of the 2019 tax year and explain to them you will take their investments once you have the proper legal processes for that, in place.
