The easiest way is to locate your invoices by logging into your MaxSold online account.
From there, simply select 'Your Activities' and navigate to the 'Invoices' tab.
https://maxsold.com/account/invoices
In addition, we send out the invoice twice: an hour after the auction closes and the day of the pickup. To ensure you get your invoice email, please check your email spam to see if it was delivered there, and add "support@maxsold.com" to the safe sender list.