Canadian VAT Number???

Getting emails to confirm my account info or lose access to revenue, and it wants a VAT number. It says "Tax payer ID not on file". It won't take an SSN, or any variation on that. so I have no idea what I'm supposed to give it. I don't have HST or PST numbers, but they're supposedly optional - as is the VAT number, according to the form.

I sell conductive thread, $12 for 10 yards of thread worldwide, postage included, and total sales for the last year are less than 35, and I mail this out as letter mail. It's not a profit thing, I just happen to have spare thread on hand that someone might use to make their gloves touch screen compatible, or make repairs to fencing equipment, so I'm loth to spend time getting tax numbers and such, and may well just discontinue selling this way.

But I digress. What would make Etsy happy in the form of an (obviously NOT optional) VAT number?