QuickBooks Payroll Error Code 15311 typically occurs when there is an issue with the digital signature or a file related to payroll in QuickBooks. Here are some steps you can take to fix this error:

Update QuickBooks: Make sure you are using the latest version of QuickBooks as outdated software can sometimes trigger errors. Go to the Help menu in QuickBooks and select "Update QuickBooks" to check for updates and install them if available.

Reset QuickBooks Payroll Updates: Go to the Employees menu and select "Get Payroll Updates." Click on the "Reset" button and then select "OK." Try updating your payroll tax tables again.

Install Digital Signature Certificate: If the error is related to the digital signature, you may need to install the digital signature certificate. Follow these steps:

a. Close QuickBooks and go to the folder where the QBW32.exe file is located.

b. Right-click on the QBW32.exe file and select "Properties."

c. Go to the "Digital Signatures" tab and make sure that Intuit, Inc. is selected in the signature list.

d. Click on "Details" and then click on "View Certificate."

e. Click on "Install Certificate" and follow the prompts to complete the installation.

f. Restart QuickBooks and try updating your payroll tax tables again.

Check Firewall and Antivirus Settings: Sometimes, firewall or antivirus settings can block QuickBooks from updating properly. Make sure that QuickBooks and its components are allowed through your firewall and antivirus settings. You may need to consult your firewall or antivirus documentation for instructions on how to add QuickBooks as an exception.

Repair QuickBooks Installation: If none of the above steps work, you can try repairing your QuickBooks installation. Go to the Control Panel on your computer and select "Programs and Features" or "Add/Remove Programs." Find QuickBooks in the list of installed programs, right-click on it, and select "Repair." Follow the prompts to complete the repair process.

If you continue to experience the QuickBooks Payroll Error Code 15311 after trying these steps, it may be advisable to contact QuickBooks support for further assistance or consult with a qualified IT professional to diagnose and fix the issue.

Regards,
Peter