We would encourage you to stay with your firm throughout the duration of your training contract. If you are planning to leave then you need to contact ICAS to complete appropriate forms and request an ‘assignation review’ to ensure your achievement log is complete and accurate to the date of leaving your old firm.
If you have already left your firm and need to invite your previous firm to review your logbook, please see the guidance here.

Please also look over the Student Handbook. The current version is effective from 1 April 2022
You should email students@icas.com to request further guidance.