I"m in need of help with solar credit carry forward.

my client purchased solar panels in 2020 for 40K. they received the 30% credit on 2020 taxes but nothing carried forward to 2021, or 2022

why? shouldn't their be a carry forward for the remaining? Is it a 2020 glitch? Is all the credit used up? Shouldn't the credit carry for 3 years?!!! I just noticed that tax year 2020 was the only year they received credit. I'm hoping to amend 2021 and 2022 to carry the remaining credit.

any help would be appreciated. they have a lot of tax liability.

thanks,

Hogan Taxes