Qasr (Shortened Prayers)

How many days can I shorten my prayers if I am visiting my mother in another state for 13 days? Sayyed Mohammad Al-Musawi	Is the distance traveled for calculating Hadd-e-Tarakhkhus calculated from the end of the town or city centre? Zaid Alsalami
What can I do if I am due to miss Asr and Maghrib prayers due to travel and will reach my destination at midnight? Sayyed Mohammad Al-Musawi	I always forget that I am a traveler and I say my complete prayers instead of Qasr. Will my prayers be accepted or do I need to repeat them? Sayyed Mohammad Al-Musawi