You can fill out the form provided in our main forum post and post it there, or if you have an account on chaimi.art then you can submit it there if your slot is on the website. 

If you don't have an account, but would like to submit through the website, all you have to do is create an account, link a deviantart account, submit a claim for your slot with proof of your slot, we'll add your slot to your account, and then you can submit your design! And it is generally faster if you submit through the website after you're signed up and get your slots moved there ^^