Can I update/change my personal details before tax statements are issued? You can change or update your personal details until 30 June by logging in to your account. If you make changes after that date, your tax statement won’t reflect your new details. Related articles Will you update my details with the ATO? How do I request my tax statement online for FY20/21? What happens if my tax statement has my old personal details? Tax and the Australian Government Rebate (AGR) I'm no longer an ahm member. How will I receive my tax statement?