Self employed income (athlete) earned in another state (NY), Allocation Method

As a professional athlete, I have been confused by this. I understand that I have to pay taxes in all states where I compete. I am self-employed. All of my income and expenses are reported on my Schedule C.  The typical scenario is that I have a loss in each state.  This year I competed in NY (not my home state) for 1 day and I earned significant income and profit. When I enter the income into the Turbo Tax NY State return, I am asked to enter my NY wages, and then to select an allocation method. If I select 100% allocated to NY, I am taxed heavily. If I choose Allocate by Days, it was only 1 day and the tax goes to zero.  The more confusing part is the next screen that asks for days not worked by this employee - I am not an employee, I am self-employed. How do I complete this section properly?