How do I stop a purchase store entry from auto filling

In my books collection. I have different choices for purchase store entry. But each new entry defaults to one choice and fills it in. How do I get back to no choice so I can pick one?

Is this about the Pre-fill screen? The screen that comes up when you hit the “Add button”?

If so: that screen will always remember what you entered last time you went past that screen for just about all fields. That is done so you can enter a location for a book you’re adding, and your next book will use the same location you filled in last time, for quick adding.

Want to change it during the add process? Just tap the location, and set it to empty, or pick the location you want to use then continue.

If you don’t want this screen to come up at all, go to the menu top left, then tap Pre-Fill Settings, and then tap “Clear All” and then toggle the “Always On” to off.