TikTok could be banned on Jan. 19 under a law that forces the platform to cut ties with its China-based parent company.

So, what will happen to users after that deadline? You won’t be able to download TikTok but it is unclear what will happen if you already have the app. One expert told CBS News that users will mostly likely get a black screen that says, “this service is not available in your country.”

The Supreme Court heard arguments for two-and-a-half hours on Friday over whether TikTok can be banned in the United States in less than one week. By the end, the justices appeared ready to allow the U.S. government to force TikTok's Chinese parent company to sell the company or go dark.

TikTok is just days from being banned. Here's what to know about when it could happen and what app might be takes it place.

Some lawmakers are asking the TikTok ban date to be extended until October. The current deadline is Sunday. Here's what to know.