A customer transfered us 500$ instread of 300$. we payed hime back 200$ by e transfer. how we can match this transfer with his account?

Hi radinajorlou,

Welcome to the Community. QuickBooks is a flexible  program that helps you manage your work with peace of mind. I'll be glad to share more info so you're on the right track with your work.

Making sure you're recording your transactions properly is an essential step for maintaining clean books. To ensure accuracy in your books, I recommend reaching out to an accounting professional for expert advice on this. If you're not in contact with a professional, don't worry, you can search for one using this link here. 

I'll also leave this question open in the Community so other accountant users can share their advice. Otherwise, feel free to ask other questions, I've got your back.