I need to delete a payroll check and reissue it as a direct deposit.

Welcome aboard to the Community, @jeanne7.

In QuickBooks Online, you can only delete the most recent paycheck when running payroll.

Here's how:

1. Click Workers on the left navigation panel and choose Employees.
2. Select Paycheck list.
3. Place a check mark in the boxes next to the duplicate paychecks. If necessary, you can modify the date range with the drop-down above Pay Date.
4. Click Delete.
5. Place a check-mark in the box and choose Delete Paycheck.

I'm attaching an article with detailed instructions on how to delete or void paychecks. It also provides some quick note about what happens to the tax calculations after the process:

Delete or void paychecks.

If you're unable to delete the paycheck, I recommend reaching out to our Payroll Support Team. One of them will take over and help ensure you'll be able to get rid of it from your account.

To view the support details:

1. Click the Help icon at the top to open the Search window.
2. From there, scroll down to choose the Contact us button.
3. Input the issue /topic in the field box and then tap the Let’s talk option.
4. This will lead you to the contact information window.
5. Pick how you want to reach out to our support team: Chat or Get a callback.

Let me know if you have questions or need further help by clicking the Reply button below. Have a good one.