1099 Employee Question

In June 2023, I established an LLC company to provide educational support services to other companies.

From Jan - Dec 2023, I worked with 3 companies, by providing educational support services, as a 1099 Employee, and each of those 3 companies gave me a 1099-NEC.

 

QUESTION 1:   When I file my income tax for 2023, from Jan - June 2023, do I file all expenses as myself as an Independent Contractor using my SSN (not under the LLC company)?

 

QUESTION 2:  From July - Dec 2023, do I file all expenses under the LLC?

 

QUESTION 3:  Since for all companies, I provide the same services, can I list all expenses under one company, or do I have to list it per each company that gave me a 1099-NEC?