Prompt: CMN.ATO.GEN.EM0019 Amendment was rejected because the original return was lodged using a different financial year form.

What this means:

The ATO has identified that the original tax return was lodged using a different financial year form than the one currently selected for the amendment. Because of this mismatch, the ATO will not accept the amendment.

Guidance:

Before attempting to amend again, confirm the following information with the ATO (or via the client’s ATO portal):

1. Original Lodgement Financial Year. Confirm the exact financial year the return was originally lodged under (e.g. 2023 vs 2024 form).

2. Original Form Type Used. Identify whether the return was lodged using:

- Current-year form

- Prior-year form

Original tax return lodgement date (ie January 22, 2024) is earlier than FY 2024 period start. Ensuring the form year consistency resolves the issue in most cases.

3. Processing Status. Confirm the return is fully processed (not pending, cancelled, or superseded).

4. Correct Amendment Method

Ask whether:

- A different financial year form must be used for the amendment, or

- The amendment must be lodged via an alternative channel (e.g. paper amendment or ATO-assisted correction).

Recreate the amendment using the same year form as the original return.