The Hawaii tax deadline has been extended by the IRS following devastating wildfires. Here's what impacted residents should know. Recognizing the monumental toll the wildfire disaster has taken on Maui and Hawaii counties, the IRS is offering some residents of Hawaii tax deadline extensions. And the move isn't a solo effort. The Hawaii Department of Taxation has also announced tax relief for those impacted by the wildfires.Certain federal tax filings and payments originally due between August 8,