South Carolina has many credits. You can access this specific one- Residential Retrofit Credit (Sch TC-43)- in the following way:
The Residential Retrofit Credit is on this P-R page.
Note: The Form Sch TC-43 is not included with Turbo Tax. The credit flows to the SC1040TC, but the calculation of the credit is not done through Turbo Tax.
Did you receive a completed TC-43 when you got the work done?