1] Go to Reports and Templates.
2] Right-click a report/template you wish to add your logo in e.g. Invoice. Then click Design Report.
3] On the left should be the Tool Box. Select Picture Box the 5th option down. Now left-click anywhere on the document you wish to drop the box.
4] While the picture box is selected, click the "Smart Button" (shaped like this ">") in the top right hand corner of the box to import an image. Then on Picture Box Tasks along the Image Row click the 3 dots ("..."). Then add whatever picture you want.
5] You can move the image around by holding your mouse cursor in the middle of the picture and then drag it. You can resize the image by dragging the little squares at the edge of the picture. Or you can change the size option by right-clicking the image and going to Properties. From there under "Behaviour" you'll see Sizing.
Tip
Better is it to put a smaller image in than a larger one as respects to dimension. As when an image is added, it will always take up the same amount of Hard Disc space regardless of shrinking down. This can keep the document from taking up less space on the HDD.