There are 100 layers in the heaven prepared for the myrtars

All sins of a myrtar are forgiven except debt

عن عبد اللَّه بن عمرو بن العاص أن رسول اللَّه رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم قال : يغفر للشهيد كل ذنب إلا الدين .
صحيح - رواه مسلم
Meaning:
On the authority of Abdullah bin Amr bin Aas, the Messenger of Allah, may Allah bless him and grant him peace, said: “ All sins of the martyr are forgiven except debt."
Narrated by Muslim, Authentic