Any accountant in USA will be able to help you with 5472. It's not very tough and can be done yourself as well. You have to report all transaction between yourself and the llc you form. Like a P&L statement. I personally don't know of any accountant and you can search for them on the google.
All the company formation agents will hide this 5472 compliance from the customers in the hopes of selling a company. Also, the onus of compliance lies with the owner of the company and not the agent forming the company.
You can read more about 5472 here:
https://<<snippet>>.com/2018/05/14/irs-form-5472-llc/