The primary outcome of our trial has been completed, but secondary outcome data is still being collected. When do I need to report results of the secondary outcome(s)?

Though there is no official guidance, ClinicalTrials.gov generally advises completing data entry ASAP but not later than 12 months after data collection has ended for that measure. If data collection ongoing, it is a good idea to provide the anticipated posting date for that measure so it is clear to the public when the information will be made available.