ELS Warnings and Notes
A warning message commencing with M or N is a mandatory warning instructed by the ATO.
Warning messages do not prevent any return from being Completed and Lodged via ELS, but may alert the user to check something that may have been missed during preparation.
The specific links provided for Warnings and Notes are in these ranges:
Some warning messages (those that do not start with an N or an M) are alerts determined by the [F3] Validation process and many of them are to assist with the correct calculation of the Tax Estimate.