My return was rejected because my last name was incorrect. Once I corrected it, the amount of my return lowered by almost $1000! Why did this happen?

[Anita01]

Did you have credits for children?

[mmullins3020]

We are claiming 3 dependant children.

[Anita01 · Accepted solution]

If you have child-related credits and make changes to Personal information, you often have to go back through the credits questions to reinstate them,.  Type Child Tax credit in the search window to review those questions.  Earned Income credit to review those, and Child care credit to review those,.

[mmullins3020]

I already submitted my return. I would have had no idea that changing my name would have changed anything else. Is there any way to get the rest of my refund since I have already submitted my return?

[Anita01]

It's actually a good idea to go back through all the dependent information again first and then the credits may correct themselves.  It's simply that, if you change your own personal info, you may now be a different person and your answers may now be different.
If the return is accepted this time, you would have to wait until  you receive that refund,  If it's rejected again, you can make changes and refile .  
If accepted, you'll have to file an amended return after receiving your refund.  Amended returns are filed by mail and take 12-16 weeks for the IRS to process.
Amend instructions:
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/replies/6602873">https://ttlc.intuit.com/replies/6602873</a>