What you can edit depends entirely on the release's current status. The general rule: the further along a release is, the more a change risks disrupting its store history, so later-stage edits go through a more careful process.
Draft
Everything is editable — title, artwork, tracks, audio files, stores, release date. Change anything freely; nothing has been delivered yet.
Pending / Distributing
Limited edits are possible at this stage. Minor corrections (a typo in a description field, for instance) are usually fine. Changing core metadata — title, ISRC, swapping audio files, or altering the track list — after delivery has already started can cause a release to be pulled and re-delivered by some stores, which resets that release's accumulated store history (playlist placements, saved-track counts, etc. on platforms that track this). Contact support before making a core metadata change at this stage so we can tell you exactly what the impact will be for the specific stores involved.
Live
Cover art and metadata corrections are still possible, but only through a takedown-and-redeliver process — the release is temporarily pulled from stores while corrected data is reprocessed and redelivered. During that window the release is not visible to listeners on the affected stores. This isn't something to do casually for a minor cosmetic fix; it's meant for genuine errors (wrong featured artist credit, incorrect ISRC, etc.). Reach out to support first so we can walk you through the safest path and set expectations on how long the release will be temporarily down.
What's never editable after delivery
Audio content itself (the actual master) generally can't be swapped on a live release without a full takedown and re-delivery as a practical matter — there's no lightweight "replace the file" option once a store has ingested it.