What kind of communication is required from the executor of an estate between the heirs in the state of Maryland?

I am not licensed in MD but I know from experience in other states and MD attorneys I know that the beneficiaries are entitled to initial notice. ...

Son granddaughter sisters who have legal custody over and elderly mother grandmother sister

It is not really clear from your question the situation or what you mean by "legal custody." But if someone has power of attorney or is the...

I have never seen my grandmother's will and was told by my aunt that we were left nothing, can I contest?

You would want to see the documents to know for sure. At least in the US, and probably in Canada, the grounds for contesting are that the person...

It may end up not being a problem but if you are alive and well you might want to do a new will if it is not self-proving. Speak to an attorney.

Do the children of deceased parents have the legal rights to parents retirement benefits ?

Perhaps - children are often entitled to social security survivor benefits so you'll want to contact the social security administration. Regarding...

What is the correct practice for payment to a freelance grant writer?

I would doubt your non-profit bylaws speak to this issue. I believe your board of directors would have to decide how you wish to pay this person...

Do I need an attorney for carrying out my mother's simple will or can I do it myself?

You CAN do it yourself but you have to decide if you would benefit from the services of an attorney. As perhaps the executor (?) and only child...

I am not licensed in CA and I believe the terminology used there may be slightly different however i can say the following in general: You...

What happens to the power of attorney I gave to my mother previous to getting married?

I am guessing you are referring to a general power of attorney or durable power of attorney - this would not necessarily "shift" to a spouse...

Would my current federal tax liabilities become the responsibility of a new wife should I remarry? My first wife died in 2011.

No they don't become her liabilities, but in a practical sense if you are married and you yourself have tax issues it will certainly effect where...