What is the best way to record petty cash received from different clients? If you did not use all of the money and need to return how does one make record of this?

Hi there, @accounts490.

You can set up a petty cash account to track and keep up with everything you used. 

Here's how: 

1. Go to the Settings menu.
2. Select Chart of Accounts, then pick New.
3. Select Cash from the Account Type dropdown, then choose Cash on hand from the Detail Type dropdown. 
4. Enter Petty Cash for the account name. The opening balance will be created when you move money from the checking account by writing a check or transferring funds. If you already have money to use for petty cash, enter the amount in the Balance field and choose the as of date.
5. Select Save and Close.

Once done, you can now record the amount you've used. Follow the detailed steps outlined in this help article: Set up and use petty cash.

To record the refund, follow these steps below: 

1. Select + New.
2. Choose Credit memo.
3. In the Customer field, select the appropriate customer.
4. Enter the Credit Memo Date, Amount, and Account (this is the category, product, or service you’re getting credit for).
5. Select Save.

For further details, see this article: Record a customer refund in QuickBooks Online. 

Let me know if you need more help. I'll be here to guide you more.