We had a payment with a check that was deposited but it isnt showing up in the account.

I'm glad you've visited the Community space today.

I can see the urgency of this matter, and I want to provide you with the information you need to get through this as soon as possible. Upon reading your post, it looks like the transaction is stuck somewhere. You can manually download the transaction, so it'll reflect in your account. I'll gladly write down the steps to get you going:

1. Access your QuickBooks Online company.
2. On the left navigational bar, go to Bookkeeping.
3. Select Transactions, then select Bank transactions.
4. Click Update.

You can visit this page for more details: What to do if you get a bank error or can't download transactions in QuickBooks Online.

If it still persists, you may also check the deposit speed of the product you're using. See this article for more information: Find out when QuickBooks Payments deposits customer payments.

Additionally, you can visit these articles to help you manage bank transactions and reconcile an account inside QBO:

• Categorize and match online bank transactions in QuickBooks Online.
• Learn the reconcile workflow in QuickBooks. 

Please let me know if you need further assistance managing your transactions inside QuickBooks. Also, you can post here again if you need help performing specific tasks inside the program. I'll make sure to get back to you right away. Take care, and have a good one!