So, long story short I was kindly instructed how to create a mobile friendly pdf with fields in order to have invoices on the go, and in doing so I needed to use InDesign. Everything was fine, but I needed to include my business logo and found when I copied it from my project in photoshop (res: 300 pixels/inches) and pasted to the InDesign project, the logo turned out very pixelated as though for InDesign 300 is really low res. Can someone help me understand the pixel resolution ratio between photoshop and InDesign a little better? or maybe even how to import layers from photoshop files (PSDs) to InDesign Projects? Is that even possible?
Yes, you're doing it wrong. The resolution becomes screen resolution when you copy from Photoshop. You need to choose File > Place and place the Photoshop file.
Alternatively, you can use Adobe Bridge. From Bridge or MiniBridge, you can drag images into InDesign. But NOT from Photoshop.
and it may APPEAR lower resolution in the preview, depending on your view settings. By default ID uses "Typical" dispaly quality, which is a low-res proxy. Try View > Display Performance > High Quality Display, and you may want to change this in your preferences as well.