Chainsaws

I have a model 120i chainsaw purchased in 2017. Serial number is 2017 2000257. I used it last fall and it worked beautifully. This spring when I attempted to use it, the saw won't start. I know it's under warranty, but I can't find my receipt. I ordered it online, but can't remember who it was purchased from. Will you please help me resolve this situation so I can get my saw repaired?