How many years can you go back and amend a state tax return? Is it 3 years?

[Just-Lisa-Now- · Accepted solution]

I believe CA gives you 4 years, so it may depend on the state.

[AshleyatIntuit]

Generally, you must file Form 1040X within three years from the date you filed your original tax return or within two years of the date you paid the tax, whichever is later.