You can schedule a new post to TikTok by clicking the big yellow new post button in the top right hand corner or by clicking the plus button on the day that you'd like to schedule for.
Simplified’s content calendar will allow you to upload your TikTok video and caption. Then once it's time to post, you'll get a notification in your TikTok app with the video and an email with your caption, just copy and paste it in and you're ready to go.
*Note - You must post the video in your TikTok account, it will not automatically publish.