Thanks for asking! You have two options for this:
1. Click the "Custom / 2nd Yeast" box in the Yeast section and enter the name of the yeast you're using. You can also use the Custom Attenuation box to override the deault
2. If you send me over all the info on the yeast (attenuation, flocculation, temps, alcohol tolerance, company, name, etc.) I can add it into our DB so it'll show up for everyone. Would want to make sure this is a fairly widely used yeast, but happy to do this.