How can I find out if an assessment that has been submitted to the Register of Wills by a PR is accurate?

Hire an atty and a registered broker to get a separate opinion and then be guided by the findings.

Hire a lawyer to contest her claim.

How can someone get authority over deceased belongings and mausoleum?

The mother needs to hire her own lawyer to answer these questions.

How do i find out if my father left a will when he died or if he had any retirement or pensions

You need to retain a probate atty who can assist you in gaining the standing to seek the information you seek from the various companies.

How can I find out what my grandparents left me from their estate?

You need to retain an estate attorney who can track down the veracity of the statements made by your mother and determine what, if any, you are...

If a piece of property is not described in a will correctly, what do you do?

Call a local probate and title lawyer and find out about what can be done to resolve these issues.

How can I find information on an annuity where the owner has died and I may be the beneficiary?

What about their tax returns? Did they receive a 1099 or similar end of the year tax form on the annuity?

What can a person do when no probate was filed and it has been over 2 years?

If the mother died over one year ago then a Petition to Determine Heirship or small estate affidavit will have to be filed in the Mother's estate. ...

What are my rights?

Retain a local atty who can run through any rights that you might have including but not necessarily limited to filing a claim for services...

Is it normal for a probate distribution to take this long?

You might consider retaining an atty in the county where the estate was opened and have them look into this matter for you. AVVO has a great list...