Thank you for reaching out here in the Community, frostaiga.
We can record your sales so that it would reflect on your Accounts Receivable (A/R) by creating retainers in QuickBooks Online (QBO).
Here's how:
Step 1: Create a liability account.
Go to the Gear (⚙) icon, then select Chart of accounts.
Click New.
From the Account Type ▼ dropdown list, choose Other Current Liabilities.
On the Detail Type ▼ dropdown menu, select Trust Accounts - Liabilities.
Enter a Name for the account (for example, Trust Liabilities) or accept the suggested name.
Choose an option from the When do you want to start tracking your finances from this account in QuickBooks? dropdown list.
Click Save and Close.
Step 2: Create a retainer item.
Go to the Gear (⚙) icon, then select Products and Services.
Click New.
On the Product/Service information panel, choose Service.
Enter a name for the new product or service item (for example, Retainer).
On the Income account ▼ dropdown menu, click the liability account that was created in Step 1.
Click Save and close.
Additionally, once you have set up the accounts, you can begin to create Sales receipts or Invoices for the deposits or retainers you receive. You can refer to Step 4 from this article for further assistance: Make a sales receipt or invoice in QuickBooks Online.