mle4
Level 2

Discovered that an investment account I thought was closed isn't

Today I got an email that a statement was available for an account I thought I closed years ago. I called and apparently it wasn't and they have been sending statements and tax forms via email but it must have been going into spam because today was the first time Ive ever seen it. My question/concern is that I haven't reported that 1099 div in 10years but the investment website only goes back to 2014.  I can see that I can go into turbo tax and amend 2020 and 2019 but i need to go futher. What is the best way I should do this? It dates back to years I don't have those years taxes on my computer. Do I call the IRS? Do I amend starting at 2014 and work my way up? or what? Can I call turbo tax and they can help me?