TIN MATCHING Program for Sole Proprietor EIN- Biz Name or Legal Name?

I have to fill out a form for Amazon selling.

 

And it wants my EIN for sole proprietor. However I lost my SS4 like 5 years ago somewhere.

 

So.....I can't remember if it was for example "Don Smith Photography" or it was in the name of "Donald Smith" (legal name).

 

If I have both (which I'm sure I put like Don Smith Photography on it) but it's a sole proprietor EIN....so it's linked to my Legal name of course and soc. sec number.

 

Anxiety.........So I ended up using my full legal name on the W9 and it "Verified" however........now I worry at tax time it will get rejected for TIN Matching error or something and cause some huge issue since I don't have the original SS4 anymore.......and too much anxiety to call IRS and get a copy