To enable:

  1. Sign into your QuickBooks account.
  2. Click the Gear menu in the upper right corner.
  3. Click User Profile.
  4. Click the Security tab.
  5. Scroll down to Two-step Verification and click Turn On.
  6. Choose to receive the one-time passcode by either text message or voice message and click Turn On.
  7. Enter the one-time passcode you received password and then click Continue.

To disable, follow the same steps except click Turn off in Step 5.