In Jain Dharma, a soul reaches Siddhashila after all karmas are completely shed. Here is the simple, canonical idea:

• The path to Moksha is through right faith, right knowledge, and right conduct (the three jewels) plus sincere purification of the soul (nirjara) and steadfast practice.
• When all karmic bonds are burnt away, the soul is no longer bound to rebirth. At that moment, it resides in Siddhashila, the pure abode at the top of the universe where liberated souls dwell.
• There is no physical journey through space after liberation—the movement is a result of the soul’s shedding of karma and its final liberation from the cycle of birth and death. The liberated soul remains in Siddhashila.

Notes:

• Both Digambara and ŚvetĀmbara traditions affirm that Moksha ends the karmic bondage and places the soul in Siddhashila. Minor descriptive details may differ in emphasis between traditions, but the core idea is the same: complete liberation from karmic matter and the dwelling in Siddhashila.
• If you’d like, I can share a concise sutra/stotra reference and its meaning from authentic Jain sources.