Good day, @Emancipare. I'm here to clear things out regarding the deposit and sales receipt showing on your end.

You'll need to link the bank deposits on the invoices. This is so the payments turned into a single record for QuickBooks to match your bank records. To do this, follow the steps below:

1. Open an invoice and select Receive payment. 
2. On the Receive Payment window, choose the deposit.
3. Click Save and Close.

Review this link for more ways to record your receivables: Record invoice payments in QuickBooks Online.

A sales receipt is a transaction record that the seller issues at the time of sale to verify the provided product or service and the amount the buyer paid. If this contains the same information as the deposit, consider deleting it. This way, there will be no duplicate ones.

Here's an article about putting payments into the Undeposited Funds account before combining them into a deposit: Deposit payments into the Undeposited Funds account in QuickBooks Online.

For the transactions from last year, I recommend consulting your accountant. They can assist you in correcting them while ensuring your accounts are accurate.

Once settled, review your accounts in the program to ensure they match your bank statement: Reconcile an account in QuickBooks Online.

You can always get back to this thread if you need anything else other than sales concerns by clicking the Reply button. I'll be here to help. Keep safe!