If you are trying to print through a photo center like Walmart, Costco, Walgreens or CVS the only type of file they allow you to upload is a JPG.
When you select the file type you want to download from Corjl, make sure you select the JPG option and NOT a PDF or PNG.
We do not recommend using a photo center to print your template as it will provide a more glossy look and the file quality and resolution is reduced. Rather we recommend you print at a local office supply shop like FEDEX, OfficeMax, Office Depot or Staples where you can upload the PDF file and print on high quality card stock.