Begin with searching for a name for your business that's unique and not already taken at US Patent and Trademark Office website: tmsearch.uspto.gov/search/search-information
Discuss a business structure with your attorney and a CPA based on your priorities such as providing for anonymity, intergenerational wealth transfer, lowering taxes: iqeq.com/ bridgefordtrust.com/
You can obtain a virtual office address: www.anytimemailbox.com/ or ipostal1.com/
For business website and email address, use workspace.google.com/ or www.godaddy.com/
Domain name purchase: www.namecheap.com/ or www.wix.com/
Trust is setup with help of an attorney. LLC is registered with the Secretary of State's office for which one will need these:
NAICS code: www.naics.com/
EIN can be obtained from: www.irs.gov/businesses/small-businesses-self-employed/get-an-employer-identification-number
DUNS can be obtained from: www.dnb.com/en-us/smb/duns/get-a-duns.html
Unique entity ID can be obtained from: sam.gov/
As LLC is setup, ensure these documents are in place: Articles of Incorporation, Operating Agreement, Board of Advisors, Annual report of operating expenses, By-Laws and Benefeciary of Ownership (if needed).