If you are a full year resident of NY, it will tax the income and give you a credit for the other state to which tax is paid. If you are part year or nonresident, you should be able to go back through and change the allocations.
You must be using desktop since you used the term re-install. You can switch over to forms mode and delete a form. You can also override an entry, go back through the program, then return to forms and cancel the override. This would also correct your situation.
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