Find your Tribal ID Number (TIN) in your account.
After logging in, your dashboard shows your Tribal ID Number.
Look at the profile card on the left side.

Your TIN is shown on the dashboard profile card.
Click View Full Profile on your dashboard.
Your TIN is also shown on your profile page.

Your TIN is shown below your name on your profile.
Your TIN is shown as TIN: followed by your number.
You can write it down or take a screenshot.

Your Tribal ID Number.