How to avoid federal underpayment penalty in CA disaster area for 2023 tax filing?
I live in Santa Clara county, CA, which is a disaster area and federal tax filing date is 10/16, 2023. My 2022 income was much higher than 2021 since my company was acquired, and I had high capital gain in Q4, 2022. I had paid 110% of the tax I owed for the previous tax year (2021) by Jan 2023 as estimated tax. Seems I still own a lot of fed tax for 2022. If I file tax return and make tax payment by 10/16/2023, Will I j=have interest and underpayment penalty for big tax balance?