Yes, it is allowed to help any family member from Zakat if he is: 1) Really poor.
2) Abiding to Islamic rules.
3) He should not be a parent or a spouse or a sibling, because it is compulsory to look after the needs of your parents and spouse and siblings from your own money not from Zakat or Khums.
You don't need to inform him if he is entitled to Zakat that it is from Zakat.
It is highly recommended to help the needy relatives as the Hadeeth says: There is no charity when a relative is in need. لا صدقة وذو رحم محتاج.
Zakat and Khums are obligatory on every Muslim who has more than his expenses. Taxes are part of our expenses and Khums will obligatory on the remaining amounts after paying all the lawful expenses including Taxes.
Imam Ali (AS) is the Imam of all Muslims by order of Allah (SWT) declared by the Prophet Muhammad (SAWA) in hundreds of occasions including Ghadeer Khum in which the Proohet ordered all Muslims who were present to give allegiance to Ali (AS) as the leader of all who believed in the Prophet ( SAWA). The political plot of Saqeefa did deprive Imam Ali (AS) from his right in the government, but did not change the fact the he is the real Imam of Muslims. Being the real Imam, Imam Ali (AS) never dealt with the three Khalifs as real successors of the Prophet (SAWA) but just worldly rulers. He never gave them his Zakat nor prayed behind any of them. ( Al-Thahabi; Seyar A'lam Al-Nubalaa' , Vol 9, Page 284) stated: Ali did not attend with the three Khalifs any Jum'ah Prayer nor Jama'ah prayers.
as salam alaikum
Income taxes and other similar taxes are not counted as zakat. Zakat is a religious duty and an act of worship that is paid with a specific intention and whose revenues are to be given to the recipients specified in verse 60 of sura al-Tawbah.
With prayers for your success.
There is no Zakat in the afore-mentioned situation. In Shi'ah Fiqh Zakat is specific for certain items and particular scenarios.
And Allah knows best.
Poverty is a test for people who are not poor to examine their obedience in paying Zakat.
No doubt Zakat aims to eliminate poverty.
You must do every thing you can to return the money to its owners either directly to them or to their inheritors if they are dead.
If you tried your best and could not reach to them, then it must be given to the Marja' of Taqleed who will distribute it to the poor as Majhool al-Maalik (unknown owner) on behalf of the real owners.
It is permissible to donate to nun-Muslims
The child who lives with such a father does not have to consider the things brought into the house as being usurped (ghasbi) andn the child can make use of them with no problem.