Is it permissible to give charity from the money of a Christian father, even if he forbids it? What is the ruling on Zakat al-Fitr? Is Zakat obligatory on jewelry that contains forbidden items (crosses)? And what if it is difficult for the questioner to give Zakat due to her environment?

If a father gives an allowance to his daughter with the condition that she does not donate any of it as charity, then the condition must be fulfilled. Zakat al-Fitr becomes obligatory on the daughter if she possesses a sa' (measure) in excess of her needs on the day and night of Eid; otherwise, it is obligatory on the father. She is permitted to take it from his wealth without his knowledge if he refrains from giving it. Scholars have differed regarding the obligation of a Muslim daughter to financially support her disbelieving father, with the majority deeming it obligatory. Thus, if the daughter does not find the means to pay Zakat al-Fitr, it falls upon her father.

As for jewelry: If it is not made of gold or silver, there is no Zakat due on it. If it is made of prohibited gold or silver (such as that bearing images of crosses), Zakat is due on it if it reaches the nisab (85 grams for 24-karat gold, 97.5 grams for 21-karat gold, and 595 grams for silver), and 2.5% of its weight is to be given. If the daughter is unable to pay it, the Zakat remains a debt upon her, and it is not permissible to take it from her father's wealth without his knowledge. If the jewelry is permissible gold or silver adornment, there is a difference of opinion regarding the obligation of Zakat on it, with the majority holding that it is not obligatory.