Some of the well known are USAA, Navy Federal, and Veterans United.

@Sonya C.if you have an LLC and own investment properties (operate) outside of the incorporated state then you may need to file a LLC tax return in each of those States even if the LLC is a Single Member LLC and disregarded for Federal tax purposes. 

Do the tax breaks apply only to federal income tax or state income tax also?

I don't know the cost of things in your area but you would get the proceeds of the sale tax free from federal income tax from the primary residence exclusion.

Looking for clarification regarding the change to the Florida State law moving through the legislature preempting STR regulation from city and county governments.

My husband was able to retire fairly young from a government job.

Legal counsel for N.A.R. approved the agreement early Friday morning, and The New York Times obtained a copy of the signed document.The deal, which lawyers anticipate will be filed within weeks and still needs a federal court’s approval, would end a multitude of legal claims from home sellers who argued that the rules forced them to pay excessive fees.

Is it taken by government/ condo-hotel?

This is all Federal taxation. 

Laws governing real estate agents are left to each state to determine such as what counts as proper paperwork for a transaction and even how long a broker has before they're required to get back to you.