What are the step-by-step instructions for filing a California tax extension online with the Franchise Tax Board (FTB)?

California grants an automatic six-month extension to file your state tax return, but it does not grant an extension to pay any taxes you owe. To avoid penalties, you must pay your estimated tax liability by the original filing deadline. Here is how to secure your extension by making a payment online: Step 1: Estimate Your Total Tax Liability Before the April 15 deadline, calculate your expected total income for the tax year and estimate your California income tax liability. You do not need to file a specific extension form if you pay online. Step 2: Calculate the Amount You Must Pay Subtract any state taxes already paid (e.g., through payroll withholding or quarterly estimated payments) from your total estimated tax liability. The remaining balance is what you must pay by April 15. If you do not owe any tax, the filing extension is automatic, and you do not need to take any action until the extended deadline of October 15. Step 3: Visit the FTB Payment Website Go to the Franchise Tax Board's official website for payments. You can find this by searching for "FTB Web Pay" or navigating directly to ftb.ca.gov/pay. Step 4: Choose and Complete the Payment Process Select a payment option, such as Web Pay (direct debit from your bank account) or credit card (which involves a service fee). You will need your Social Security Number, address, and bank account or card information. Crucially, when prompted for the payment type, select "Extension Payment" for the correct tax year. Step 5: Save Your Confirmation After submitting your payment, save a copy of the confirmation page or confirmation number. This is your official proof that you paid by the deadline, thereby securing your automatic filing extension. Important Details and Nuances: The deadline to pay your California taxes is typically April 15. The automatic extension gives you until October 15 to file your return. If you are due a refund or owe nothing, you do not need to do anything to get the extension. Simply file your return by October 15. Warnings and Limitations: An extension to file is not an extension to pay. If you do not pay the full amount you owe by April 15, the FTB will charge interest and a late payment penalty on the unpaid balance, even if you have an extension to file. This is general information and does not constitute legal advice. For complex situations, such as significant tax liabilities or business-related tax issues, consult with a qualified California attorney or tax professional.