On or Before May 31 (or 30 days after a notice of appraised value was mailed to you, whichever is later).
Late protests are allowed if you miss the usual deadline for good cause. Good cause is some reason beyond your control, like a medical emergency. The ARB decides whether you have good cause.
Late protests are due the day before the appraisal review board approves records for the year. Contact your appraisal district for more information.
Special Deadlines
For change of use (the appraisal district informed you that you are losing agricultural appraisal because you changed the use of your land), the deadline is before the 30th day after the notice of the determination was mailed to you.
For ARB changes (the ARB has informed you of a change that increases your tax liability and the change didn't result from a protest you filed), the deadline is before the 30th day after the notice of the determination was mailed to you. If you believe the appraisal district or ARB should have sent you a notice and did not, you may file a protest until the day before taxes become delinquent (usually February 1). The ARB decides whether it will hear your case based on evidence about whether a required notice was mailed to you.
* The deadline is portponed to the next business day if it falls on a weedend or holiday.