Passport Visa & Destination Forms have a Green Check mark
TRC issue with Submit COVID-19 vaccine records and/or test results for my flight YYZ-EWR. I click Upload Documents. Takes me to to window :Transport Association (IATA) and is subject to change. For the most up-to-date entry requirements and COVID-19 restrictions, visit an official government website for your destination.
Privacy Acknowledgement. I agree. Takes me back to TRC" Submit COVID-19 vaccine records and/or test results for my flight YYZ-EWR". I click upload Documents & back to Privacy Acknowledgement.
Never had this issue before. Submit COVID-19 vaccine records and/or test results option for my connection flight EWR-LAX (There are currently no requirements for this segment.) LAX-MEL (There are currently no requirements for this segment.) For my EWR-YYZ -Vaccination document required.

Update:COVID-19 vaccine records and/or test results. Was able to complete it on the APP. Clicked on option saved Vaccine record. Have Green Check mark for all TRC requirements!