Error Prompt: CMN.ATO.IITR.210037 - Response for Private Health Insurance Tax claim code is incorrect

Suggested Solution:
1. Go to "Spouse" tab. If tax payer had a spouse at the end of the year, then the date in line item "Before what date you had a spouse" should be 30 Jun 2026.
Spouse tab:

Taxpayer with spouse until 30 June 2026 (e.g. is only a part year spouse from August 2025 to June 2026):

2. If this date (30 June 2026) is set, then the tax code should not be Tax Code A or Tax Code B. Below example is a sample form with tax code C that was selected.

NOTE: If you have any clarifications, you can call ATO to validate. Please see below ATO contact detail for tax agents:
- Tax Practitioner Assistance Line is 13 72 86, select fast Key codes 3, 2, 1 between 8.00am and 6.00pm, Monday to Friday, excluding public holidays.