If you had a tax liability (you owe any income tax), then the solar credit would be used to reduce your tax liability. This means that your refund would increase by the amount of credit that was used on your return. If there is any credit left over, then it can be used on a later tax return.
Technically, you are not getting any of the solar credit refunded to you, but you would get back more of your withholdings as a result of the credit.
The issue with your return may be a result of the 'miscalculation' you mentioned, which may or may not be related to the solar credit. It could be another issue entirely. Take a closer look at the letter of explanation from the IRS to try to understand what was changed. Without understanding what they changed, there is no way to know if you can amend your return to fix the situation.
To learn more, take a look at the following TurboTax article: Federal Tax Credit for Residential Solar Energy
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
