Depreciation from previous years

Last year I started a small business - I bought equipment that I listed as assets to depreciate - looks like 5 years, and elected to take a portion of the value as a deduction in 2021.

This left me with a portion of the equipments' value as an asset to depreciate.
However, I'm not sure how to claim the depreciation this year. It should be 1/5th of the value that was given last year, since it was a straight-line depreciation.