I want to know why I didn't receive my complete refund

[JeanneLO]

It could be due to an offset or a change to your tax return by the IRS:

An offset is used to pay off past-due federal tax, state income tax, state unemployment compensation debts, child support, spousal support, or other federal non tax debts, such as student loans. Also, you could see a change in your refund amount because the IRS made a change to your tax return.

Here is more information:

https://ttlc.intuit.com/replies/3288510