Amended return issue & CA LLC

Client filed as a partnership/LLC in 2018.  In 2018, client bought out partner and continued the LLC.  Client was advised to end the LLC and just use schedule C for both CA (California) and Fed purposes.  In 2019, client filed Schedule C for both fed and CA, same in 2020, and 2021.  However, he did not dissolve the LLC and expected and didn't inform me of that fact.  In 2022, the CA taxing authority demanded LLC returns for all the missing years (2019,2020, 2021).  I have completed the CA 568 forms using Proseries Professional and the CA option of filing the Schedule C as an LLC.  All worked perfectly until I tried to amend the CA personal return.  I tried deleting the schedule C and saving the data, but as soon as I reopen the file, the schedule C returns as a result of the Federal data.  I am wondering if anyone has a solution other than to eliminate the schedule C from the federal side and carefully check the CA state to make sure no data was lost that is needed.  I' hoping someone else has gone through this process.  Thanks.