You can set your Link in Bio for your TikTok account from your profile. It's incredibly easy to do so and just takes a few steps.

Step 1 : Access your TikTok Profile 

As a first step, open the TikTok app, look for the profile icon in the bottom-right corner, tap there, then tap Edit Profile, as shown below:

Step 2 : open the Website settings

Now that you are in your Edit Profile page, look for the Website field and tap there, as shown below:

Step 3 : set your Link in Bio and Save

Now you simply need to add the URL of your Link in Bio and then tap Save as shown below:

All done! Your Link in Bio is now visible in your TikTok profile!