LodgeiT can pull "New" and "Lodged" Activity Statement from the ATO, if you want to amend and make a change, please follow below:
1. Import the Activity statement, learn more
This example shows the difference between form that has been lodged using LodgeiT and pulled from the ATO -
2. Once the form is in LodgeiT, you need scroll through the form and press "Amend"
Once you've selected Amend, then be sure to use the Prefill option on the top Right of the form.
In cases when the user creates an amendment and receive such an error on prelodge/lodge, the user must contact ATO directly. It seems ATO blocking amendment of the BAS for some reason.