The majority of deadlines listed here are for Tax Year 2023. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.
Prepare, eFile, Download
CA + IRS Tax Return
April 15, 2024
Tax Year 2023
Income Tax Return
Prepare and e-File an IRS (Due Date: April 18, 2024) and California State Income Tax Return (Due Date: April 15, 2024).
eFileIT
April 15, 2024
2023 Income Tax Extension
Tax Year 2023
Income Tax Return after the April 15, 2024 California Tax Extension
Last day to e-File a 2023 California State Income Tax Return for Tax Extension Filers and late eFilers. You can
only e-File (to file by paper see below) a California Income Tax Return together with an IRS Tax Return.
eFileIT
October 15, 2024 via mail-in Forms.
Forms incl. Mailing Address are listed below.
Tax Year 2023
Income Tax Return after the April 15, 2024 California Tax Extension
Deadline for taxpayers who got a CA Tax Extension to file their California Income Tax Return by mail-in Forms—the Forms incl. mailing addresses are listed below—is October 15, 2024. (Optionally, the
eFileIT deadline is Oct. 15, 2024). Instructions on how to
only—without the IRS return—complete and file a California State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
IRS Due Dates
IRS Tax Return, Extension, Amendment Deadlines
2023, 2024, etc.
IRS Federal Income Tax Return, Amendment, Extension Deadlines
April 15, 2025
2021 California Income Tax Return Refund.
The last day to file—you will not face late filing penalties—and claim your 2021 California Income Tax Return Refund. This deadline does not apply if you owe 2021 Income Taxes.
Details.
April 15, 2026
2022 California Income Tax Return Refund.
The last day to file—you will not face late filing penalties—and claim your 2022 California Income Tax Return Refund. This deadline does not apply if you owe 2022 Income Taxes.
Details.
April 15, 2027
2023 California Income Tax Return Refund.
The last day to file—you will not face late filing penalties—and claim your 2023 California Income Tax Return Refund. This deadline does not apply if you owe 2023 Income Taxes.
Details.
April 15, 2028
2024 California Income Tax Return Refund.
The last day to file—you will not face late filing penalties—and claim your 2024 California Income Tax Return Refund. This deadline does not apply if you owe 2024 Income Taxes.
Details.