Varying Salaries
When sharing your employment details, you will be asked to add your annual income (pre-tax). 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 task.
Contact the company that requested your Thirdfort check, and they will be able to confirm how they would like you to enter your variable income.
You can add multiple sources of income within the Source of Funds task. Add your main form of income during the Employment details section, and any other income in the Additional Income section.