I understand you want to activate your account for a check deposit, and I can see how convenient this feature is for customer like you, @thewickedarticho. 

Mobile check deposit in QuickBooks Payments requires eligibility criteria and are subject to approval. Concerning that, they will also check if your bank account is eligible for instant deposits. With that, let me endorse you for the support that accomplishes the action and to ensure you are qualified, we highly recommend calling our QuickBooks payment support.

See the steps below:

1. Log in to your QuickBooks Online account.
2. Click the Help option in the upper-right corner.
3. Tap the Contact Us button.
4. State your concern in the box.
5. Lastly, press Have us call you.

For your guide about the application of check deposits, see this page: Get instant deposits in QuickBooks Online.

There you go, @thewickedarticho. I'm excited to provide more information on any QuickBooks-related topic. Please add it in the comment section. May you have a great day.