Depending on your company's program policy, subsidies in various benefits accounts may rollover for up to a certain period and may have a cap.
Renewal, rollover, and expiration are automatically calculated by your Twic account and you may find the relevant dates in your Twic Wallet. Simply click on the wallet icon on the top right hand corner in your account to find this information.
For details, please refer to the policy listed in your account. The program policy may also be found on your company's benefits wiki or by reaching out to the benefits team directly.