STEP 1: When you open the template in Adobe Photoshop software the template looks like the image below.
You can see there is a 1 Inch NO PRINTING area on the left side of the template. Do not place any artwork in this area as the artwork in this yellow area will not be printed.
Use the white area to create your artwork (See the image below).
STEP 2: Use [My Artwork] layer to create all your art.
STEP 3: Rasterize all Fonts. Go to Layer menu -> Rasterize -> Type.
STEP 4: Delete the Instructions layer before creating PDF.
STEP 5: Save File as Press Quality PDF and set standard as PDF/X-1a:2001.