When you invoice a customer, which account is credited with the sale?

Hi there, @rchinchoy.

Welcome to the Community! It's my pleasure to answer your query regarding the accounts affected when invoicing your customer. 

When setting products or services, you assign the income account. The defaults are Sales of Product Income (inventory) and Sales (non-inventory and service). Later, when you sell them, QuickBooks credits the associated account to record the sale.

If you need to assign a specific income account for them, you can do so with these steps below:
 

1. Click the Gear icon, then choose Products and services.
2. Select Edit just beside the product or service name. If you need to add a new item, click New.
3. In the Income Account drop-down, choose the appropriate account.
   
4. Make the necessary changes.
5. Click Save and close.

Additionally, when you sell them on credit, you send an invoice and get paid for them at a later date. Now, you record the money that your customers owe to you as Accounts Receivable in your books of accounts. QuickBooks debits this account when you create an invoice.

Visit me here again should you have other concerns or questions. I'm excited to hear from you. Have a wonderful day!