I sold my inventory back to Mary kay. I took a loss of 10%. I don’t know where I’m supposed to plug that information into. I have 0 inventory as of this year.

I sold my inventory back to Mary kay. It gave me 90% back so I took a loss of 10% on everything I purchased. Do I need to include the amount I was returned on my taxes. I didn’t make a sale or profit so I didn’t want to include that in sales? I don’t know where I’m supposed to plug that information into. I have 0 inventory as of this year.