You can update the tax ID number associated with your account at Stripe.com. You can reach your account at Stripe.com via WooCommerce Payments:

1. Go to Payments > Settings.
2. Click Manage in Stripe to be taken to Stripe.com
3. Click the pencil icon in the Business Details (company accounts) or Personal Details (individual accounts) section.
4. Find the relevant Tax ID field (EIN, SSN, etc.) and click the Replace button
5. Enter the new number.
6. Click Done.

Once you complete these steps, you will be prompted to agree to an ownership transfer agreement. You can do this by clicking the Add button, then following the prompt to accept the terms and conditions.