Recertifying Income Question

Hi,

I am confused how I recertify my income before I switch off of the SAVE plan. I filed MFS this year. Yesterday, as I was attempting to, I kept being sent to the IDR application on the student aid website. It didn’t ask for any documents. The MOHELA website was equally unhelpful.

Do I just apply for the new IDR plan and they recertify my income from their end?

Or is there a more detailed application process for recertifying?

Thanks!