How to deal with inventory return in qbo, estimate doesn’t show the material is back to inventory?

It seems like a customer returned an item, Ali-alhasan. I'll help you sort it out. 

An estimate is a non-posting transaction. This means that it will not affect your inventory count. 

In addition to what Rustler shared, you'll have to create either a credit memo or refund receipt so the item will be returned to stock. A credit memo can be applied to the next invoice. While you use a refund receipt when the customer asks for a refund. 

Here's how to create a credit memo:

1. Click the New or Plus sign (+) icon.
2. Select the Credit memo.
3. Fill in the necessary fields.
4. Click Save and close. 

Then, here's how to create a refund receipt:

1. Click the New or Plus sign (+) icon.
2. Select Refund receipt.
3. Fill in the necessary fields.
4. Click Save and close. 

I'll share some screenshots for better guidance.

.

I'll add share some articles for better guidance:

• Enter and apply credit memos and delayed credits in QuickBooks Online 
• Record a customer refund 

Reach out to us if you need further help. We're just right here to assist you.