1. Log in to your Interactive Brokers account.

2. Go to the Transfers and Payments section.

3. Once there, click on Fund Transfer.

4. Now, select Make a Withdrawal.

5. Choose US Dollars (USD) as the currency to withdraw from the dropdown menu.

6. Select "Connect your bank account via ACH" by clicking the "Use this method" button.

7. Choose the Checking Account option under Account Type.

8. Enter your ABA routing number (you can find it in ABA/Routing Number in the "Receive" > "Dollars" > "ACH (Standard)" section of DolarApp).

9. Enter your bank account number (you can find it in Account Number in the "Receive" > "Dollars" > "ACH (Standard)" section of DolarApp).

10. Confirm the bank account number.

11. Tap the "Connect bank account" button.

12. And that's it! Once the accounts are linked, you can withdraw from your Interactive Brokers account to your DolarApp account.