بسم الله الرحمن الرحيم
(Fatwa: 749/587/D=9/1438)
As per the rule small sins are forgiven as well as the big sins which Allah wills to forgive He may forgive them with His special authority. Besides, the person shall be sinful if he violates the rights of people or misses salah, fast etc and he shall be questioned on the Day of Judgment about these acts, then either he shall be punished by sending in Jahannam or Allah shall forgive him out of His special mercy.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband