I can not Link Home depot credi card to QBO again, what should i do?

Good morning, @leili-sarafraz-g. 

Welcome to the Community! 

Sometimes, your credit card/bank may lose connection with QuickBooks Online. However, all you need to do is long back in. 

Before moving further, can you provide me with a screenshot of the page that's holding you up from connecting your credit card again? 

This will help me determine your next steps in order to resolve this problem. I'll be waiting for your response!