The recent mailing I got from Joann’s fabrics had a coupon code for 40% off online between April 20th and May 10th.
It is TAB0420.
You can try that and see if it works. I get a ton of these because I am on the preferred customer mailing list (snail mail). I also must have filled in something that gave them my email address, because they send me coupon codes in my email every couple of weeks. Usually it’s 40% and sometimes even 50%. I’m sure there’s some way to register on the web site for these emails if you want them.