https://www.irs.gov/tax-professionals/choosing-a-tax-professional

https://irs.treasury.gov/rpo/rpo.jsf

"new accountant" - tells me they lied about their credentials or you assumed. Go back to them as they should as a minimum return you every penny they charged you and if they do have proper credentials should correct the issues for no charge (and give you refund for their gross incompetence.)