I was surprised that my Schedule C net income is exactly $0. I tried to change some numbers in my home office deduction, and the net is still zero. Why??

[TaxGuyBill]

Many Home Office deduction expenses CAN'T give your business a loss.  So with all of your Home Office expenses, you would have a loss, but that is not allowed so those unallowed expenses will be carried to future years until they can be used.

Another possibility for showing exactly $0 net income is that you checked the box that you are "Not At Risk", which also means that any excess expenses can not create a loss and they would be carried forward.  It is VERY unusual for a person to be "Not At Risk", so most likely you should say that you were "At Risk".