During the Credits
There are multiple extra scenes during the credits of Toy Story 4.
In the extra scenes, the toys are shown adapting to their new lives following the end of the film, including a fantasy scenario with Duck and Bunny imagining themselves as giants and shooting lasers from their eyes and Forky getting a girlfriend.
After the Credits
There is a stinger after the credits of Toy Story 4.
Duke Caboom replaces the lamp during the Pixar logo and receives a high-five from the Toy Soldier who had missed out on one earlier in the film.
Special thanks to Dominic, Bryan Parker, @f3tjang, and James Kite & Mei Mei for the stinger submissions!