Known Error Codes

CMN.ATO.IITR.EM0042
Error: An amended tax returm has been received without an original being lodged. Solution: Don't make an amendment of an ITR, just lodge as original...
Thu, 2 Oct, 2025 at 11:52 AM
CMN.ATO.INCDTLS.000255
Error: Total credit for tax paid by trustee from managed fund must be provided. Solution: This error means that Credit for tax paid by trustee should be ...
Sat, 10 Jul, 2021 at 12:37 PM
CMN.ATO.IITR.100029
Prompt: Solution: All the 4 criteria below should be met to resolve the validation error. This is an ATO error. This means we cannot avoid it and users s...
Fri, 28 Nov, 2025 at 7:20 AM
CMN.ATO.CTR.500231 / CMN.ATO.CTR.500161 / CMN.ATO.CTR.50022
Error: CMN.ATO.CTR.500231 - Tax loss 2019-20 carried back to 2018-19 must be provided. Solution: Leave items A and O blank and validate. Refer to b...
Fri, 24 Sep, 2021 at 8:12 AM
Trust this device
Reasons why "Trust this device" doesn't work could be following: The user clicks "Sign Out" each time. The option in browser &...
Wed, 1 Sep, 2021 at 2:37 PM
Oops! Something went wrong under the hood
Error:  Solution:  Please see following suggestions that could help to resolve the issue: Try another browser. If it won't help, please try to ...
Fri, 23 Sep, 2022 at 11:32 AM
CMN.ATO.IITR.730456
Error: Total Current year capital gain is incorrect Solution:  This validation error says that total current year capital gains must be greater than or ...
Tue, 2 Dec, 2025 at 1:27 PM
CMN.ATO.INCDTLS.000116
Error: Open the PAYG Summary and  leave blank the payment type from lump sum A section to resolve the issue.
Thu, 19 Sep, 2024 at 1:10 PM
CMN.ATO.AUTH.011
Error: The client you transmitted is not associated with the agent number you supplied and cannot be authorised.  TABLE OF CONTENTS A. Client not in ...
Mon, 1 Dec, 2025 at 6:27 AM
CMN.ATO.LDGPROG.EM60230
Error: CMN.ATO.LDGPROG.EM60230 User not authorised Solution:   If some other agent will add the client by TFN to their list in ATO portal it will break ...
Thu, 19 Jan, 2023 at 9:44 AM