The tag team rules don't differ too much from the standard poker tournament. The main difference is that instead of 9️⃣ one player playing one stack of chips to the end of the competition, players can tag in and out of 9️⃣ the hot seat to play a few betting rounds.
Each player can take as long as they want at the table 9️⃣ - betting as many hands and rounds as they'd like - so long as every player from each team plays 9️⃣ in the tournament at some point. Though this rule may vary between each location.
In the WSOP Tag Team Event, each 9️⃣ player has to play one full "round of blinds" or the team will be disqualified.
Another important rule that is incorporated 9️⃣ in almost every tag team tournament, is that players cannot tag in-and-out during a hand. This means if you start 9️⃣ a hand, you must play the hand through to the end before you can switch out for another member of 9️⃣ the team.
Bottom line: You can only tag-in another team member between hands.