How can the sales revenue be deferred on it's total relevant period?

I can show you how to record those sales revenue, @menna-yasser-lem.

You can create a single invoice and then record partial payments within those periods of months. Here's how:

1. Click the + New button. 
2. Select Receive Payment.
3. Choose the profile of the customer from the Customer drop-down menu.
4. Under Amount Received, enter the amount of the partial payment.
5. Add the Reference no. and Memo if applicable.
6. Click Save and close. 

More details can be found here: Record invoice payments in QuickBooks Online.

Then, you can check on the following article to know more on how to run reports to see your sales by products and services: Use reports to see your sales and inventory status.

I'm ready to help you again if you have concerns recording your transactions or with QuickBooks Online. Looking forward to your reply in this thread. Take care and have a great rest of the day!