Invoices and claims need to be submitted to Accounts Payable no later than 11 a.m. The deadline to file a protest has been extended to May 30, in part because of updates to the website and a high volume of traffic.Generally, May 15 of the Tax Year at issue, or 30 days from the date reflected on your Value Notice, but check your Value Notice for your particular deadline. The Tarrant Appraisal District has extended the deadline for protesting property values, after many property owners have been unable to access TAD's website. Tarrant Appraisal District said its new website launch is delayed after a ransomware attack.