We do not support the ability to change your CoinTracker email at this time from the Settings page.
While we do not have an estimated release date at this moment we can assure you our engineering team is working diligently to allow user's to change their email. You can follow along for updates on this forum post.
We understand this can be inconvenient for our users, as a temporary solution we recommend users create a new CoinTracker account with the desired email and re-add your wallets and exchanges to your new account. We (CoinTracker) can then transfer your Tax Plans or provide a credit for your Portfolio subscription to your new account to resume your services.
You can submit a request here
for more assistance.