First after probate has been opened and the personal representative has been appointed, you will receive notice and information regarding the probate process. The personal representative will have to publish a notice to creditors for three consecutive weeks in the county in which the decedent resided, and the creditors have up to four months to submit their claims. This is just one of the time frames in the probate process and there are many variable results.
So it is up to you to monitor the probate step by step and if you have concerns about a particular procedure or failure of the personal representative to act, you may then want to consult with a probate attorney for more information.
It is almost impossible to describe all the variables which might affect the time to act. If there are significant assets at stake, you might also want to hire an attorney to advise you throughout the entire process. Generally these fees are not reimbursed by the estate. They would be your responsibility.
Please note that I am answering this question as a service through Avvo but not as your attorney and no attorney-client relationship is established by this posting. An attorney-client relationship can only be established through signing a Fee Agreement and paying the necessary advanced fees.
The easiest way to get the basics is to google "probate process in Arizona." That will get you started. Lots of law firms post such information and you might also find some courts that post general outlines. That is the first thing I look for when checking on the probate laws of another state.
***Please be sure to mark if you find the answer "helpful" or a "best" answer. Thank you! I hope this helps. ***************************************** LEGAL DISCLAIMER I am licensed to practice law in the State of Michigan and have offices in Wayne and Ingham Counties. My practice is focused in the areas of estate planning and probate administration. I am ethically required to state that the above answer does not create an attorney/client relationship. These responses should be considered general legal education and are intended to provide general information about the question asked. Frequently, the question does not include important facts that, if known, could significantly change the answer. Information provided on this site should not be used as a substitute for competent legal advice from a licensed attorney that practices in your state. The law changes frequently and varies from state to state. If I refer to your state's laws, you should not rely on what I say; I just did a quick Internet search and found something that looked relevant that I hoped you would find helpful. You should verify and confirm any information provided with an attorney licensed in your state. I hope you our answer helpful!
In addition to what has already been said, I would just add that you need to monitor the situation yourself. The Inventory is due in 90 days (as you mentioned). Once you receive that, if you notice major errors, then there are certain things you can do. Also, if you believe that you are not being treated fairly, there are certain things you can do. It really depends on your specific situation.
My general advice is this: Monitor the situation and see what happens. If you accumulate some evidence that the Personal Rep is not handling the estate properly, then you might have sufficient reason to have the court appoint a successor Personal Representative. But, don't jump the gun ,,, unless you believe that the estate is going to be wasted or squandered or some other irreparable damage is going to occur.
And I agree with a previous answer. If you need help, hire an attorney. This sort of thing is really hard to do on your own.