Sent invoice but i have a bill to pay (trailor hire )from the same customer. they have subtracted bill from invoice and sent 1 bank tranaction i dont no how to balance

Hi mkmurdoch-outloo,

You'll need to create an invoice and bill in QuickBooks Online and then create a journal entry to offset credits in the customer and supplier. Let me show you how to create a journal entry for this.

1. On the + New button, select Journal entry.
2. Enter the Journal date.
3. On the first line item, select Accounts Receivable.
4. Enter the amount as Credits and select the customer name.
5. On the second line item, select Accounts Payable.
6. Enter the amount as debit and select the supplier name.
7. Select Save.

Once done, go to the customer and record the invoice payment and allocate the journal entry just created. Do the same when recording the supplier payment. 

Also, you can may check on this article for your reference: Record a barter transaction. 

Feel free to drop a comment below if you need further assistance. Have a great day!