Revenue has extended its pay and file deadline for online submissions.
Originally midnight on November 14, the deadline has now been extended by 48 hours to midnight November 16.
Revenue said the extension is to assist customers who may have been impacted by power outages during the recent storms.
In a statement, Revenue said that the ROS and payment support helpdesks will be open until 8pm on the nights leading up to the new deadline.
They will remain open until midnight on 16 November to assist with filing returns and making payments right up to the deadline.
The deadline for paper returns remains October 31.