Open TikTok and tap the plus button
Record or upload your video
Tap the checkmark to go to the editing screen
Tap Voiceover
Move the playhead to the spot where you want the voiceover to start
Press and hold the record button to speak
Release the button when finished
Tap Save
Adjust the original sound and voiceover volume if needed
Tap Next
Add caption, hashtags, and post your video