There are times your browser is full of frequently accessed page resources causing websites, like QuickBooks Online Payroll (QBOP), to act weirdly. And can be the reason why you're unable to preview a payroll after entering it.
To begin with, let's consider QBOP using a private browser. To use a private or incognito browser, here's how:
Know that you can always leave a reply below if there's anything else that I can help you with. I'll surely be around, ready to lend a hand. Stay safe!