
Quoting
Taxing Matters
The IRS will apply the federal law factors for determining whether one is an employee for federal tax purposes. It is certainly not bound by the state agency determination. If the state criteria would be broader such that a person would be classified as an employee by the state but not under the federal criteria then the IRS still applies the federal criteria and the person would not be classified as employee for federal tax purposes. While not common, there are instances where an employee is indeed treated as an IC for one purpose (e.g. federal tax) but not another (e.g. state unemployment comp program).