If you submitted for 2020, your paper will be carried over by default. We expect to have a further round of submissions for the 2021 dates.
The submission of papers will be managed through the EasyChair online conference management system. The conference submission page is: https://easychair.org/my/conference?conf=tc2020. A new CfP will be added during January with a closure date during April 2021.
If you have never used EasyChair before you must first register a free account. If you already have an account then you can log in to EasyChair and submit.