I am primary beneficiary of a trust I would like to dissolve with the principal going to my children. The trust reads that the principal will be distributed to my children after I have died and when my youngest child is 45 years old.

The trust does not say it cannot be dissolved.

1) Would it be expensive to dissolve the trust?
2) Can I disclaim the principal in favor of my children without any tax liability on my part (It is a GST exempt trust)?
3) Will I have to wait until my youngest child is 45 to dissolve it thusly?

Thank you for any help on this!