Do I need receipts for my hsa account

No. Receipts would only be required in the unlikely case of audit.

Your HSA bank will give you F1099-SA that reports the total. That's all that is reported on F8889.

In case the IRS *does* choose to challenge the amount that you indicated as being used for qualified medical expenses, you should be saving all receipts for unreimbursed medical expenses until the statute of limitations for the IRS to make such a challenge expires, usually 3 years after the due date of your tax return.