Margaret runs a business as a rock band promoter. During the 2019/20 income year, she earned 200000 assessable income from her business. She also worked as an employee for another rock band promoter where she earned $10500 for the year before tax. She contributed $40000 to her superannuation fund had her total superannuation balance on June 2019 was $1.3million. 

Is Margaret eligible to claim a tax deduction for her personal superannuation contributions and, if so, how much can she claim?