Now you can easily add your booster dose by using the Add Booster feature in your GoGetDoc dashboard.
Once you have added a booster, your full original vaccine record will be shown on one wallet pass that you can present for verification, and the booster dose details will be on a separate card, should you need them at a later date.
Login to your GoGetDoc account. Click the Wallet tab to view your VaxYes record:

Navigate down to the Details button and click the dropdown arrow to see Add Booster.

Once you've added a booster, you can download your booster wallet pass by clicking Add to Apple Wallet for iPhone or clicking the down arrow > Download pass on Android.
Pro-Tip: If the "add booster" option doesn't appear, log out of the dashboard, refresh your browser, and log back in. Use Safari on iPhone or Chrome on Android for best results.