How can i split an amount received and allocate it to an invoice and bank charges

Hello there, @usermathur_chavi. Welcome to the Community.

You'll first have to receive the invoice payment amount using the Undeposited Funds account. Then, do a bank deposit and add the charges in the Add funds to this deposit section. This way, the invoice amount won't change and match what's owed and paid by the client.

To receive an invoice payment, go to the + New button, then select the Receive payment feature. Make sure to choose the Undeposited Funds account in the Deposit to field. Once done, let's deposit the payment and add the bank charges through these steps:

1. Go to the + New button.
2. Select Bank deposit.
3. From the Account drop-down, choose the account you want to put the payment into.
4. Select the checkbox for the payment you received in the Select the payments included in this deposit section.
5. Scroll down and go to the Add funds to this deposit section.
6. Enter all the necessary details ( Received from, account, and Amount) of the bank charges.
7. Click Save and close.

I've attached a screenshot below that shows the last four steps.

Once done, I'd recommend pulling up the Deposit Detail report. This is to verify the transaction above is recorded accordingly. Just go to the Sales and customers section from the Reports menu's Standard tab.

Also, you're able to create attractive and professional looking invoices in QBO. This way, you can add the info that matters most to your business. You can learn more about it through this article: Customise invoices in QuickBooks Online.

I'm just around to help if you have other concerns about managing invoices and payment transactions in QBO. Take care always.