As an owner of one rental property, I found out that I was/am supposed to send a 1099 to a contractor who did some work for us on our rental property last year, and file a 1099 on that same contractor with the federal government.

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.

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.

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

Is it taken by government/ condo-hotel?

This is all Federal taxation. 

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.

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.