How do I manually enter sales and expenses? I don't want to link my bank account or POS app.

Thank you for posting here in Community @malacina1303,

You can create a bank account for recording purposes only without connecting your personal bank or POS app. You can just add an account in your chart of account.

Let me walk you through the steps on how to enter sales and expenses in your QuickBooks Online account. Here's how: 

You can enter a sales transaction in QuickBooks Online using the invoice. Follow these steps on how to create an invoice:

1. Go to the +New button.
2. Select the Invoice tab.
3. In the Customer field, choose the customer whom you want to address the invoice.
4. Select the Item or Service in the Product/Service column.
5. Enter the amount of the invoice in the Amount box, and also the information needed in the fields.
6. Click the Save and Close button.

To learn more about entering the invoice including the receive payment process, visit this link: Create invoices in QuickBooks Online.

Also, for the expense transaction. You can record it by entering a bill. Here's how:

1. Click the + New button.
2. Under the Vendors column, choose the Bill tab.
3. Click the Vendor drop-down arrow, and select the vendor.
4. Put the information required in the fields and also in Category or Item details.
5. Click the Save and Close button.

You can read this article for more details about entering bills, and also paying the bills: Enter and pay bills in QuickBooks Online.

Check out QuickBooks Online Help Article to learn more about entering a sales and expenses in QuickBooks Online.

If you have additional questions, just leave a message in the comment section. I'll be happier to help. Have a nice day!

@malacina1303 

You may prepare your data in XLS/CSV and utilize a 3rd party tool to import them in bulk.

https:// transactionpro.grsm.io/qbo