Have a sad situation where the husband and formerly primary income creator had a significant stroke and has become disabled.  Communication with wife and financial manager constantly breaks down.  Husband sold 2 Tehachapi land parcels in Sept 2020 and did not inform wife or forward escrow for tax return-a rather large LTCL.  It's nearing time for CA disaster-extended 2022 filings and Sept ES payments due to the sale of a rental property with rather large LTCG and depre recapture regular income.  I would like to go through the really involved process of amending 2020 and 2021 returns to get what would be a large adder to their carryovers through the 2022 returns for possible use in 2023.  The real question if any of this is possible:  How to manage the changes in all of the carryover items between the years when there's no desire that otherwise change the 2021 filing?  Thank you in advance for any comments...!