Does Siddhas remove all their karmas?
Yes. In Jain Dharma, a Siddha is a liberated soul that has completely destroyed all karmas and is free from the cycle of birth and death.
A Siddha has destroyed:
- Ghati karmas: Jñānāvaraṇīya, Darśanāvaraṇīya, Mohanīya, Antarāya
- Aghati karmas: Vedanīya, Nāma, Gotra, Āyu
So, a Siddha is fully karmeless and resides forever in the Siddha Śilā, in pure consciousness, bliss, knowledge, and perception.
This is the final state of liberation in Jainism.