I am using a new computer for tax year 2024. Unable to access my 2023 return. The instructions are murky, they say go to Tax Home. Cant find.

What did you use for 20 23?  The Online version or the Desktop installed program?    For Online  you need to sign in to the exact same account to transfer from 2023.

How to Transfer into the Online version
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/transfer-last-year-return-turbotax-online/L279eUvY2_US_en_US?uid=l8w7nlbv

If you used the Desktop program you need to have the file ending in .tax2023 to transfer into 2024.  

How to Transfer into the Windows Desktop program
https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-for-windows/00/26145

How to Transfer into the Mac Desktop program
https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-turbotax-for-mac-software/00/26062