If your average income has changed recently, then YES, you can update your health insurance plan and you may qualify for a larger premium tax credit that could lower your plan price. You should update your health application immediately so your plan price may adjust for the following month.
You can report a change in your household income at any time by logging into your Stride dashboard or contacting your health insurance exchange directly.
Head to this page for state by state instructions on how to update your income on your application.
Instructions on how to calculate your income are here.