In payroll setting, there is funding limit and it says $40.0K per payroll. what does it mean exactly? Last time my total amount for payroll include remittance was $45K.

Hey there Dom12,

Thanks for turning to the QuickBooks Community for support! QuickBooks Online is a great tool able to help keep your books balanced. I would be happy to provide some information.

Every company has a limitation on their Direct deposit total per pay run. This is set up in accordance with the information you've provided during the set up process. This is not associated with your remittances. The remittance is the federal tax owed to the CRA. Here are a couple helpful guides that i encourage you to take a look at. 

Get help if you’re over a direct deposit limit

Make payroll tax payments

If you require further assistance, I recommend reaching out to the support team outside of the Community. They'll be able to do a screenshare with you as well as verify your account details in a secure setting. You can reach them by following one of these options:

Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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I hope this helps!, If you have any other questions, feel free to reach out to us here.