Thank you @fanfare !
Those disallowed wash sale loss were in year 2019. During a few month period of time in year year 2021, I did not hold any stock. That means, I disposed of all stocks in year 2021 or before. So, If I use the disallowed wash sale loss incurred in year 2019, I should be able to use all the wash sale loss incurred in year 2019 as extra cost basis on my 2021 return. Is that correct please?
