You bet! Please contact us anytime with the details that need updated.
When editing the subscription, each box needs to be filled in before you can click the "change" button. Simply choose the same options as your current subscription (product, shirt size, term), other than what you want to change. You will be taken to a confirmation page to compare the old settings and new settings, click "confirm" to save changes.
For shipping address updates, it's a two step process. Add the new address to your shipping addresses box towards the bottom of the page, then adjust the address in your subscription.