Yes, informal agreements that the parties accord to are valid.

Report the tax preparer to the IRS and to the relevant authority (CPA or EA association).

Yes, you do need to report it. Likely Schedule D should work.

Feel free to contact my office. 212-444-3034

Likely yes. I am an attorney and CPA. Feel free to look up my profile and contact information.

Should I open an estate account?

Sorry for your loss. Yes, an estate bank account should be established. This is fundamental to any will or intestate administration. If you have...

Can employer send to IRS duplicate of W-2 if not received by IRS?

Generally yes you may do so. You may be able to backdate the W2.

What's the maximum amount I can write off on my personal income?

This is a question that requires research/analysis for which you should retain tax counsel.

A PLLC may elect to file as an S corp or as a C corp. For example, my law practice PLLC reports taxes as an S corporation. There are some time and...

For NYC, setting up an LLC that elects to file as an S corporation is generally advisable. This is generally the most tax efficient structure. You...