I am realtor in the State A.
I owned the property under LLC company name in State B.

First question

Do I need to disclosure that owner is RE licensee?
Owner is company, not individual.

Second question

Can I sell FSBO with broke co-op?(I will pay commission to the buyer agent)

Or I should find the realtor in State B and list and sell

1) No
2) Yes you can sell FSBO with broker participation on whatever terms you want.