OK, thanks for the prompt response.
After thinking about this and considering that all of the income generated for the trust in tax year 2021 was reported using the old EIN, I plan to submit the tax return for tax year 2021 using that old EIN. Then I will notify the proper entities about the EIN change for tax year 2022 (ie, they need to use the new EIN) and will submit the tax returns for tax year 2022 and beyond with the new EIN. Does that sound like the right course of action? Also, I plan to fully document this situation in a letter to the IRS and the other trustees for future reference. Thanks, again, for your help with this.
