Rolling12 months query

Hi,

I've tried many times to create a list of the latest 12 complete months but failed, essentially I would like a funciton like

List.Dates with syntax List.Dates(start as date, count as number, step as duration) but the duration can only be days, not months thus making it difficult for me. I would like todays date minus 10 days to be my starting month or ideally "YYYYMM" and then the following to be the 11 months before that. Any ideas? Thank you!