TLDR: When adding savings, include your yearly pre-tax income. For variable income like overtime or bonuses, contact the requesting organisation for guidance on how to report it.
Changing Salary
When adding your savings, you will be asked to add your yearly pre-tax income. If you receive any overtime, bonus or other income that changes month to month, you may still be required to enter this as part of your source of funds questionnaire.
In these instances, please contact the organisation that has requested your Thirdfort check, and they will be able to confirm how they would like you to enter your variable income.