I am trying to assist someone in fixing excess contributions for these 5 years. He had his taxes filed by CPA, that apparently didn’t make the connection that he had no earned income (only military retirement pay). I’ve looked at all IRS instructions, and understand how to fix one year, especially the 2019. My question is can he calculate the total excess contributions, the total excess earnings, calculate penalties and report all on one return? Or does it have to be filed for each year with 5329, and maybe amended returns. TIA