ICR payment plan

I am consolidating a Stafford loan and Perkins loan that is in default. They said I would be put on the ICR plan. I am not currently working for pay and haven't for a few years. I have been caring for my disabled sister. They want me to sign a paper requesting my tax information from the last few years, but I haven't had to file so there is no information. Will I have a really small payment each month?