Thanks, @Anonymous_.
Yes, got that---I understand the basic premise of EOY last year being Beginning of Year this year.
The problem is something else.
Whatever TurboTax directions I followed last year resulted in the 2020 EOY inventory value field being automatically populated in Beginning of 2021 as... blank. Not even a 0. Maybe I didn't have an inventory value last year? This business has been more of a side income thing, gradually evolving into a more established source of income, and perhaps last year I chose a more simplified method.
As far as I can tell, I should perhaps choose simplified options only this year and see if it keeps me out of questions that are difficult to answer.
