Donating to Tom book?

Do you have Blathers on your island yet? If you do, try donating to him. If not, I suppose you should ask Tom Nook what you should do, maybe then you'll be able to donate them.

Thanks! The reason might be that my brother made his account first,so I might need to do it on his account.

Yeah, that's probably the problem. Try it out, I hope it works!