Thanks for joining this thread, @Tori9. I'll direct you to the best help to ensure you can upload your W2 for Maryland by fixing the error "File extension is incorrect".
Since following the instructions in uploading your W2 keeps showing an error, I recommend contacting QuickBooks Desktop (QBDT) Payroll support to further investigate and locate the root cause of the issue to resolve it as soon as possible. Here's how:
- Go to the Help icon and select QuickBooks Desktop Help/Contact Us.
- Type in the error you need help with.
You can also visit this article to review the process of filing your W2: File your state W-2s with Quickbooks Desktop Payroll Enhanced.
Additionally, check out this reference to guide you in preparing your tax forms QBDT: Year-end checklist for QuickBooks Desktop Payroll.
If you have additional challenges in filing your W2 for the state of Maryland, never hesitate to return here. We'll respond to you promptly. Keep safe always.
