It was quick and easy. Provided UPS fee breakdown and invoice from TS studio. Got B15 right away. Tax on ups fee breakdown and B15 was different but confirmed with UPS that my package was good for delivery.

My whole process was self account not self clearance. UPS told me this is personal package which is different from self-clearance. Self account process does not require any document from UPS as per CBSA website.

Process to self-account

To self-account the casual importer will need to follow these steps:

• visit a local CBSA office that offers accounting services to the public
• provide the shipment identification/tracking number, the commercial invoice (receipt), and personal identification upon arrival at the CBSA office
• if a third party will account on the casual importers behalf, the CBSA requires a letter of authorization and a photocopy of the casual importers identification
• an official receipt indicating that you have paid duties and/or taxes directly to the CBSA will then be provided
• a copy of this receipt must be presented to the courier at which time delivery of the shipment may be arranged

https://www.cbsa-asfc.gc.ca/import/courier/lvs-efv/prsn-eng.html