If the solar property was purchased, installed and completed in 2020 then you can only enter the credit on a 2020 tax return to be filed in calendar year 2021.
Additionally, look at the Form 5695 Line 14 worksheet again. There is no mention of a Line 47 on a Form 1040.
Form 5695 instructions page 4 - https://www.irs.gov/pub/irs-pdf/i5695.pdf#page=4
