Here's how to link a card to your PayPal account:

1. Go to your Wallet.
2. Click Link a debit or credit card.
3. Follow the instructions to link your card. 

To link a card on the app:

1. Tap  Wallet. 
2. Tap  +  beside Banks and Cards.
3. Tap  Debit and Credit Cards.
4. Enter your card details or scan your card.

You can link 4 cards to your PayPal account. When your account is verified, you can link up to 24 cards.