The blessings of Allah Almighty are showered throughout the month of Ramadan. Allah says: “There is any one whom I will grant”. It can also be for forgiveness. This second Ashra is also called the Ashra e forgiveness. In which the person who sincerely asks for forgiveness from Allah. So, the Most Merciful forgives him.
Prayers are offered for seeking this forgiveness. The best dua in this regard is to read between 11th to 20th of Ramadan. In this page you can see that dua in both Arabic and Urdu. So that you can read this prayer with understanding.
Ramadan Dua 2nd Ashra
اَسْتَغْفِرُ اللہَ رَبِّی مِنْ کُلِّ زَنْبٍ وَّ اَتُوْبُ اِلَیْہِ
Astaghfirullah Rabbi Min Kulli Zambiyon Wa Atubu Ilaih
میں اللہ سے تمام گناہوں کی بخشش مانگتا/مانگتی ہوں، جو میرا رب ہے اور اسی کی طرف رجوع کرتا/کرتی ہوں۔