I'm sorry to hear about your mother. As PV has outlined, you have until 16 November if the return is submitted online. You have two options - to submit the return based on draft figures or to make contact with Revenue prior to the submission deadline and explain the situation. The key thing is to get to speak to a specific individual in the income tax section of your Revenue district, get their name and direct line as your point of contact, explain the situation and get them to agree to waive any late filing surcharge which may arise.