I have overpaid my 2024 quarterly Estimated Taxes and will be due a refund or credit for 2025 taxes. Is there any penalty or interest due if I am unable to complete the return by October 15, 2025? For example: if I don't file the return until November 1, 2025 and the return shows I am owed a refund, is there any late filing penalty or interest assessed? Is this true at the state level too (California)?
