Recently, buyer's agents have to jump immediately, each time a new listing hit, due to such limited inventory, huge competition, and listing agents not placing or honoring offer deadlines. 

From my point of view you need to separate work and investing by giving them deadlines and sticking to them.

If already purchased, you are entitled to your money back plus interest, but there is a 5 year deadline for that, and a 2-year deadline for getting the overbid back.ADOR just reporting what the county told them.

If you have a handle on the value of the house, can make an offer that protects you and adhere to the contingency deadlines like inspection and financing,  a buyer's agent does nothing but waste your time and cost you thousands.  

Warning about limited availability.If you wait until close to the tax filing deadline to search for your CPA, your options will be limited.

For example I'm thinking of David Greene's suggestion that you agree up front to provide a monetary incentive for the GC to get the work done correctly and on time, along with a penalty for blowing past the deadline.

I used Robert Hall & Associates (Glendale, Ca) last year and that went ok with all the fun with extended deadlines and lockdowns and remote work.

I recommend a formal letter with the bills attached and a deadline for payment.

Is tax filing deadline and corporate tax act information filling deadline same which is April 15th?

This is incredibly useful for enforcing lease violations and fees for missing renewal deadlines.