This issue has been resolved Tax Manager and Elite forms release 2026.2.0.
The prefill data shows that the taxpayer is only eligible for the Simple BAS reporting method. This means the G2, G3, G10 and G11 fields do not apply and are correctly disabled.
An issue has been identified where the incorrect reporting method is selected, and you are unable to choose the Full reporting method.
The release will also include:
A new field that shows the reporting methods the ATO has made available for each statement.
Restrictions that limit reporting method selection to only those allowed by the ATO.