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January 8, 2019

First day to transmit live returns. 

April 17, 2019

Last day to transmit timely-filed returns

*Due to the Emancipation Day holiday on April 16, 2019, tax returns filed and payments mailed or submitted on April 17, 2018, will be considered timely. If the balance is not paid by this date, penalties and interest may apply.

California state personal income tax returns have an automatic six-month extension date for timely filing. 

All taxes owed must be paid by April 17. If the balance due is not paid by April 17, penalties and interest may apply. 

April 24, 2019

Last day to re-transmit rejected timely-filed returns.

October 15, 2019

Last day to transmit timely filed current year returns on extension. 

October 22, 2019

Last day to re-transmit rejected current year returns filed on extension. 

December 31, 2019

Last day for EROs and transmitters to retain acknowledgment file material for returns e-filed in 2018. 


For each return an ERO files, the ERO must retain the return for four years from the due date of the return or for four years from the date the return is filed, whichever is later.

If the ERO uses either the California e-file Return Authorization for Individuals form (FTB 8453) or the California e-file Signature Authorization for Individuals form (FTB 8879), they must keep the form with the return for the same period of time.