ASAM

If you cannot (or do not want to) find the holotape within the game, you can load it into your inventory manually by using console commands. Press the tilde key ~ to bring up the console in Fallout 4 on PC. Press tilde ~ again to close the console.

Form ID

First you need to find the Form ID of the item you want to add to your inventory. To do so type help, then part of the item's name, and then the number 4. For example, to search for the "city manager" holotape, type:

help "city manager" 4

Note: these steps will work for any item in Fallout!

Add Item

Now you can type player.additem and then the Form ID. For example, to add the item with ID 0800544A, type:

player.additem 0800544A