Certain assets (like bank and investment accounts) pass under the beneficiary designations on those accounts and not via an estate. Depending on the size of the investment account and the number of mistakes that you perceive in the administration, it may be worth your while to consult an attorney.
Is your name on a Power of Attorney or is it there as a Joint Owner on the account? There is a big difference. Some property may pass by operation of law, like jointly-owned property such as a bank account. The POA, however, would have died with your father. I would go see a lawyer.
In addition to the presence issues as a predicate for US taxation, you also have to ask where the money goes after you make it (and potentially pay tax on it). Under the new FATCA provisions of the HIRE Act, beginning next year, US Banks will be REQUIRED to withhold 30% on all outbound wires to financial institutions that do not qualify as reporting Foreign Financial Institutions. Depending on the ownership structure and your business operations, you may have BIG problems. Go see a tax...
There is likely a litigation issue here on testamentary capacity. If you are the disinhereited child, hire a lawyer right away. You will need to contest the will on the basis of lack of testamentary capacity. If you are the child who is the proponent of the will, RUN, do not walk, to the Surrogate, file the will and petition, and get your letters.
This happens all the time with heirs who live in deceased relatives' houses that end up in estates. The questions you have to ask are: A) have you made repairs to the house, B) have you paid water bills and property taxes and other expenses for the property, C) was there a value to you being at the property (i.e. - mowing lawns, keeping tidy, preserving value, keeping from being vacant, keeping away potential robbers) and D) was there an understanding between you and the deceased (i.e.- were...
Software can nver be a substitute for an experienced attorney. It sounds like your will was drafted at a time in your life when your circumstances were drastically different. It is not a question of whether the will is valid. It is more a questio of whether the will is appropriate given your circumstances. You should consult a local attorney knowledgeable in the area of estate planning.
A child could most certainly be a trustee for a parent under New York law. However, there may be some situations where a trustee is also a beneficiary that may require at least one disinterested trustee, depending on the trust's terms and goals.