If you answered something incorrectly, you can amend to seek a better refund. When you say you only got $500 per child----are you referring to the amount on line 19? If so, then you need to check all of the screens in MY INFO when you amend and go very slowly. Make sure you did not say their SSN was "not valid for employment." And make sure you did not say the child paid for over half their own support--it is a weird oddly worded question that you have to be careful with and answer NO to.
Did you already e-file? If you have not yet e-filed you can still go back through MY INFO and make changes. Do not click on anything that says "amend" if you have not e-filed yet.
If you already e-filed, then you need to wait for the IRS to fully process the return and then amend.
Wait until your original return has been fully processed before you amend, and make sure you have saved a pdf of the original return before you amend. (If you do not save it as a pdf, the amended return will overwrite the original, and the original will be lost forever)
See this TurboTax support FAQ for amending a tax return -
CURRENT YEAR
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
