Review the sequence first
Play through the current edit. Check that each cut uses the take you want, the sound is present, and subtitles are readable. Resolve unfinished generation and save or connection warnings before exporting.
A completed export is a version of the project at that point. Later edits do not update the file you already downloaded.
Choose the export you want
Open Export
Review the settings and any limits shown for this project and workspace.
Decide how to use drafts
If the project contains eligible drafts, distinguish exporting them as they are from making final versions before exporting. Review any generation estimate.
Start the export
Wait for the current export to complete. Do not mistake a previous completed export for the new job.
Download and play the file
Check the beginning, transitions, ending, sound, and subtitles in the actual downloaded video.

Keep downloading and publishing separate
Downloading a video does not require you to make the work public. Review the visibility and reuse choices separately if you want to share it through Tacu.
To continue editing in another app, use an editing export instead of treating the finished MP4 as an editable project.