Where is my Schedule C

  You have to access your own account and/or  print it for yourself using exactly the same account and user ID that you used when you prepared the return.

Start a 2024 return online and enter some personal information  so that the menu on the left opens up and lets you access your past year returns.

https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/01/27010

https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/save-2021-turbotax-online-return-pdf/L8dHfRkpT_US_en_US?uid=m5y4ch1y

Many people have multiple TT accounts and forget how to access them.  Log out of the account you are in now.

Account Recovery

https://ttlc.intuit.com/questions/1901535-forgot-your-turbotax-online-user-id-or-password

https://ttlc.intuit.com/questions/1901486-how-many-turbotax-accounts-do-i-have

Or did you use the desktop version of TurboTax?  If so, the files are on your own hard drive or any backup device you used like a flash drive.

https://ttlc.intuit.com/questions/1901659-find-your-tax-data-file-in-mac

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/find-last-year-tax-data-file-tax-file-computer/L0XJvPaJr_US_en_US?uid=lro5b507

You can get a free transcript from the IRS or for a fee of $30, an actual copy of your tax return.

https://www.irs.gov/individuals/get-transcript

https://www.irs.gov/pub/irs-pdf/f4506.pdf

I assume you are looking for Schedule C for 2023. Schedule C is for self-employment income or business income from a sole proprietorship or single-member LLC. Did you have such income in 2023 and file a Schedule C with your 2023 tax return, or is the loan officer asking for something that doesn't exist? Is there an amount on Schedule 1 line 3 in your 2023 tax return? If not, there is no Schedule C. Did you already give the loan officer a copy of your tax return and it does not include Schedule C? If so, it's probably because Schedule C was not required. The loan officer might be mistaken in thinking that you had income that requires Schedule C.

If you did file a Schedule C, it's in the PDF of your tax return, shortly below Form 1040 and Schedule 1. xmasbaby0 gave you information on how to find your 2023 tax return.