How to start Phantom Liberty in Cyberpunk 2077 with old save?
If you want to start the Phantom Liberty DLC from an old save in Cyberpunk 2077 you have to:
Load a save file from before the 'point of no return' but after the 'Transmission' main story quest.
Wait for a call from Songbird.
Follow the 'Dog Eat Dog' quest to get to Dogtown.
If you completed Cyberpunk 2077, you can load up the save file labelled 'point of no return' to get your completion rewards along with access to Phantom Liberty.
However, if you're loading an old save file from before the 'Transmission' quest is completed, then you will have to continue with the main story until you do this quest involving the Voodoo Boys in the Pacifica district. Completing this missions activates the call from Songbird, who gives you the first Phantom Liberty quest, 'Dog Eat Dog'.
If you want to start Phantom Liberty with a brand new V, or a pre-built V, then you can access the DLC with a new save instead...
How to start Phantom Liberty in Cyberpunk 2077 with new save
There are two ways you can start Phantom Liberty in Cyberpunk 2077 with new save:
Select 'New Save' from the main menu and then 'Skip ahead to Phantom Liberty'.
Select 'New Save' from the main menu, then 'Regular Start', and play until you complete the 'Transmission' quest.
Choosing the option to skip ahead still lets you customise your V's appearance and life path, but you have to reset V's perks and attributes to have complete control over your build. Or, you can just go with the build pre-made for you and unlock the available perks you like best without worrying about attributes.
You'll also have an inventory full of weapons, cyberwear, items, and some armor if you choose to skip ahead.
Whatever option you pick to access Phantom Liberty from a new save, its worth keeping in mind that you unlock the Relic skill tree near the start of the DLC that opens up even more combat options. The Relic skills work differently than the other skill trees, so don't worry about saving your attribute or perk points for it.
For more help around Dogtown, we've got pages on Tarot Card locations, how to get all Phantom Liberty endings, and the Voodoo Treasure location.
Hope you enjoy your time in Night City's new Dogtown area!