State tax filing

Hi....Is the answer Opus 17 provided two years ago still applicable to solar tax credits for installs done by 12.31.19?  My tax liabilty will exceed the 30% credit I will be receiving.  Typically, i try to set my withholdings to be a small refund.  I really do not want to mess with my 2019 witholdings if I do not have to.  If a small refund will not impact my eligibility for the 30% credit (my tax liability will exceed that)...I would rather just leave my witholdings alone and get the credit/refund when I file my 2019 taxes by April 2020.    Thanks