ARCHIVED - T2SCH42 Calculation of Unused Part VI Tax Credit and Unused Part I Tax Credit ARCHIVED - T2SCH42 Calculation of Unused Part VI Tax Credit and Unused Part I Tax Credit We have archived this page and will not be updating...The text of this content is paywalled except for the first five days of each month. Subscribe or log in for unrestricted access. Read more about ARCHIVED - T2SCH42 Calculation of Unused Part VI Tax Credit and Unused Part I Tax Credit