If the computer cost $789 and you had 10% business use, the basis for depreciation would be $79. If you divide that up over 5 years the depreciation would be $16 per year. You would have to look on form 4562 in 2021, on line 19(b) to see what the first year depreciation was. It would be a similar amount for the second year. I'm not sure why TurboTax refers to it as 200 DB, but my assumption is there is an exception for propery used less than 50% in a business under the 200 DDB method that results in straight line treatment.
Since you say your depreciation is $79 for the first year, then it looks like the 10% business use was not entered so you need to review the asset entry to make sure it was correct.
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