Seller Verification Issue, HELP REQUIRED!!

Good Morning,

I have received an email requesting a document for a seller verification review. This isn't an issue as I have more than one of the documents requested in the email and it seems like a standard process.

However on going to submit the required document (latest Self Assessment Statement) I can se no where to add this on the page im directed to & it seems to be asking me for a confirmation of "Power of attorney" - this is not relevant to me at all and I don't understand why they are asking for such. I am a soul trader and have been so since I started trading on Amazon 6 years ago, nothing has changed.

Can anyone shed some light on this as its got me stumped as to what I need to do.

Thanks in advance