Hello,
I just realized while working on my 2024 (Not filed yet), that I totally missed updating the cost basis for my ESPP sold in 2023. I should have used the adjusted cost basis, but instead, I left it as is from the 1099-B form. I basically double taxed myself. This resulted in a loss of about $2k. I currnetly carry a loss of 32K, but if I amend, the loss would go to $34K. However, I am unsure if A) Whether to amend my 2023 or just leave it alone since it is not anything I owe the IRS. Or B) Amend, but then do I wait until the amended return is accepted before filing the 2024 to reflect the accurate data from the 'previous year'.
Also, do I also amend Arizona state return as well?
