Do you need to file an IR3 return? whether you’ll get a refund or have tax to pay. The form will prepopulate with your personal details and earnings information. This guide describes the SharpEye Model/40I Triple IR (IR3) Flame Detector and its features and provides instructions on how to install, operate, and maintain the detector. how much tax you paid on your income. IR3 QuestionIncome and expenditure from residential property. Go to and login to myIR secure online services. Do not file Form