Hey there, @joanne24.

Nice to have you here in the Community. 

In QuickBooks Online, the program is designed to make things easier for our customers. Such as auto-filling the received payments. However, this will only autofill if you receive the payment from an invoice. Otherwise, if you click the +New icon and choose to receive payment, it will not populate anything for you nor autofill it. 

You can turn this feature off. To do this:

1. Open your Settings menu, then choose Account and Settings. 

2. Click on the Advanced tab and scroll down to the Automation section.

3. Select the Pencil icon, then choose to turn off the Pre-fill with previously entered content by unchecking the box. 

4. Hit Save to save the changes. 

Please let me know if I can be of more assistance. I hope you enjoy the rest of your day!