I have the regular Dymo Labelwriter (Wireless - that part doesn't work so well). The 1x1s print really well on it. The 1x1.5, not so much 😕 The Squareup Dashboard recently changed and started hosing up my labels though. I used to HAVE to print Landscape to get my 5 digit SKU to fit. Suddenly my most recent labels were not scanning correctly and when I looked closely, they were missing a couple of bars at the end of each SKU. I switched it to Portrait and now they are working fine - although the $ of the price now sometimes prints off the left side of the sticker. As long as it scans, I'm happy!
So, although I don't have the 450 Turbo, from my experience with the Labelwriter issues, a few things you can try...use their labels. Although more expensive, I've found others don't work as well. Print only one field, like a price, to see if it's getting any data from your computer to your printer. Print from the Dymo app to see if it's an issue with the printer or with Square. Try a print with the System Dialog to see if that works any differently. There are so many parts sometimes it's difficult to pin down the problem!
