I have a new customer that their old preparer helped them form an LLC.  The old preparer has ghosted them since 2022.  I have their CP 575 letter from IRS showing 1120 needed to have been filed April 2024 but have also found 2553 requesting to changed to S-corp.  The taxpayer does not remember received a letter from IRS for acceptance only has the documents given by the preparer.  Do I assume S-corp status was accepted?  I need to file first and final return for them for 2023

Rambling I know.  Sorry.  Monday.  Happy St. Patrick's Day!