I've just discovered that in Ebay's convoluted world, nothing is ever, ever, ever straightforward.

Tried going to Sales Reports subscriptions it keep telling me to sign up for $6.99 per month even though I have SMPro.

After 30 minutes of more searching I finally found the answer.

 

I used to click on the "Sales Reports" link in the Seller Dashboard.

Now, I have to look at my SMPro Summary and click on "Reporting".

This then takes me to a screen where I can choose the month and download.

 

So:

"Sales Reports" in Seller Dashboard - not working

"Reporting" in SMPro - working

 

So dumb.