Can I file federal but not state income tax?

Yes, you can file a federal income tax return without filing a state income tax return, but this depends on the state you reside in. Some states do not impose an income tax, while others have specific income thresholds or requirements that may exempt you from filing. However, if your state requires a tax return based on your income level, you may be legally obligated to file a state return as well. Always check your state's tax regulations to determine your filing requirements.