What do I say about why I left my last job? - 11 months and counting

I have an interview next week and I am unsure how to explain why I left my last job as a paralegal. This is my first time dealing with any of this. I do not want to blame the company. Do they ask follow-ups?

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.