State tax filing

Instructions for completing a Turbotax form related to "credits" relating to AZ tax form 352 are very confusing. I've had difficulties with this particular item for the past 3 to 5 years and have never been satisfied that I completed it correctly. It's titled "Prior-Year Carry Over Information" and consists of 3 columns headed "Year of Original Credit", "Original Credit Amount", and "Amount of Original Credit Used in Prior Years". Under the first heading (for the 2020 version) are the years 2016, 2017, 2018, and 2019. The taxpayer is supposed to fill in the blanks for each year under the second and third headings, I assume using information listed in their tax returns for each year.

The instructions above the table don't make sense at all. Can anyone explain in detail how this table is supposed to be filled out and what exactly the third heading means?

Frankly, I don't understand why this information can't be transferred electronically from my past returns directly into this table.