put
https://api.everee.com/integration/v1/workers//taxpayer-identifier
Clients can update a worker’s taxpayer identifier on behalf of the worker.
A taxpayer identifier may be a Social Security number, ITIN, or other 9-digit number issued to the worker by the IRS or SSA.
When a taxpayer identifier is updated, the new number will be validated automatically using Everee's TIN Verification product (if enabled).