Fed - where and when is the exit?

Lombard writes they expect the taper announcement in June, and assuming everything moves "smoothly" we should expect the tapering to start in Dec.
They mention three main points when it comes to Fed's exit game;
1, the rapid reopening basically shortens the timeline for the tapering
2, distortions will make 2022 a difficulty year for policy (note not inflation)
3, Biden's infrastructure plan could deliver what Lombard calls "a graceful exit".
The inv bank writes;