Step 3.1. Add Payment Method
Open Coinbase website and sign in, if you are not already. Now go to Settings and click Payment Methods.
Click Add Payment Method button.
On this scren, select Bank Account (SEPA).
On this page, type in name of your bank, IBAN is your account number, and SWIFT/BIC of your bank can be found here.
The page looks like this after you added the your bank as Payment Method.
Step 3.2. Make payment
You must first put some EUR into your wallet.
Go to Accounts, choose EUR Wallet and click Deposit button.
A SEPA transfer data now appears. Now open your online bank website and use this data to transfer the money.
Step 3.3. Wait for payment
You will get notification via email that your money has arrived.
For detailed official instructions from Coinbase go here.