The movie Thunderbolts has two credit scenes. The first is a mid-credits scene featuring a lighthearted moment where David Harbour's character, Alexei Shostakov/Red Guardian, tries to get a woman in a grocery store to notice that he is on the front of a Wheaties cereal box, but she doesn't recognize him

. The second is a post-credits scene after all the credits have rolled, which is more significant and teases future MCU developments, including a crossover with the Fantastic Four and hints at the team's new Avengers identity

. So, in summary:

• One mid-credits scene: a comedic, fun moment with Red Guardian in a grocery store.
• One post-credits scene: a major tease for upcoming MCU storylines involving the newly named Avengers and the Fantastic Four.

You should stay until the very end of the credits to catch both scenes