We need separate tax treatment settings for each tax year (not just cost basis methods) to avoid the current problem where changing settings affects all historical years and ruins tax accounting. The current migration method can result in serious problems and user errors and is significantly limited. I propose all tax treatment settings, including cost basis method (FIFO, HIFO, etc.) and all toggle settings like Staking as taxable be provided per tax year. This way it will be easy to update as IRS Guidance becomes available without messing up prior and future taxes.