Deposit amount is less than Invoiced due to Venmo fee and not I can't enter the transaction

Hello @utkanf,

Welcome to the Community. I can help you handle the transaction in QuickBooks Online.

You'll need to open the invoice and enter a payment temporarily into the Undeposited Funds account. I recommend you follow this method to ensure the fee is deducted later on (see screenshot below).

Once done, please move the payment to the actual bank account by creating a deposit. From the Bank deposit screen, you can also add the fee for the service.

Please follow these steps:

1. Click the + New option in the upper-left corner.
2. Select Bank deposit under Other.
3. Put a checkmark on the customer payment.
4. Add the fee under Add funds to this deposit (you can use an expense account for the Venmo fees).
5. Enter the amount as a negative number.
6. Hit Save and close. 

For more information, as well as how to review past bank deposits, I recommend the following article: Record and make bank deposits in QuickBooks Online.

Keep me posted if you need anything else regarding recording processing fees in QuickBooks. Have a great day.