If the historical example is based on the index value as of the end of January each year, should the historical example on the HELOC disclosure from February this year to the end of January the next year reflect the year 2023 as the 15th year?

1026.40(d)(12)(xi) - 1. Index values and annual percentage rates must be shown for the entire 15 years of the historical example and must be based on the most recent 15 years. The example must be updated annually to reflect the most recent 15 years of index values as soon as reasonably possible after the new index value becomes available.

Yes, you would update the table and include 2024 as soon as practicable after the 2024 rate became available after the end of January.