do I file separate 1040C forms if I work as an independent contractor and, in addition I have my own business.

Answer 1

I think you might be confusing some terms here. If you're receiving 1099s for your work as an independent contractor, that income will be reported on Schedule C which will be attached to your 1040. However, if you have another business that isn't incorporated that also reports on Schedule C, it's entirely possible that the other 1099s can be reported on that same schedule. But if your other business is incorporated, then no-any income that was reported on your social security number will need to be reported on your individual income tax return.

Hope that helps!