QuickBooks Error 9999 Overview

The QuickBooks Error 9999 issue occurs when QuickBooks Online cannot refresh bank feeds due to a script error, blocked connection, or corrupted browser data. This error typically appears with the message “Error 9999: Script error” and prevents users from updating transactions or syncing bank activity. Many businesses searching for QuickBooks Error 9999 solutions need clear steps to fix browser settings, reconnect bank accounts, and restore bank feed functionality. Expert support at +1‑866‑408‑0444 can help resolve the issue quickly.

1. Common Causes of QuickBooks Error 9999

• Script errors in the browser

• Corrupted or outdated browser cache

• Bank server maintenance or timeout

• Blocked connection between bank and Intuit

• Expired or invalid bank login credentials

• Firewall or antivirus interference

• Damaged QuickBooks Online cookies

• Browser extensions blocking scripts

2. Fix QuickBooks Error 9999 (Step‑by‑Step)

Step 1: Refresh Bank Feeds

• Go to Banking

• Click Update

• Wait for QuickBooks to reconnect

If the error returns, continue with the next steps.

Step 2: Disconnect and Reconnect the Bank Account

• Go to Banking

• Select the affected account

• Click Edit → Disconnect this account

• Reconnect using your bank login

This resets the connection and clears corrupted feed data.

Step 3: Clear Browser Cache and Cookies

QuickBooks Online relies heavily on browser data.

• Open browser settings

• Clear cache, cookies, and browsing history

• Restart the browser

• Log back into QuickBooks Online

Step 4: Use a Different Browser

QuickBooks Online works best on:

• Google Chrome

• Microsoft Edge

• Firefox

Switching browsers often resolves script‑related issues.

3. Fix Script Error Causing QuickBooks Error 9999

A. Disable Script Debugging

• Open Internet Options

• Go to Advanced

• Enable:

  • Disable script debugging (IE)

  • Disable script debugging (Other)

B. Add Trusted Sites

Add:

• *.intuit.com

• *.quickbooks.com

C. Reset Browser Settings

Resetting removes corrupted configurations.

4. Fix Bank‑Side Issues Causing Error 9999

A. Log In to Your Bank Directly

Check for:

• Security alerts

• Password reset prompts

• Multi‑factor authentication blocks

B. Wait for Bank Maintenance

Banks often run overnight maintenance that interrupts feeds.

C. Re‑authorize Third‑Party Access

Some banks require periodic re‑authorization for QuickBooks.

5. Fix Security Software Blocking QuickBooks

A. Add QuickBooks Antivirus Exclusions

Exclude:

• Browser executable

• QuickBooks Online URLs

B. Disable Script‑Blocking Features

Some antivirus tools block JavaScript required for bank feeds.

C. Allow QuickBooks Through Firewall

Ensure ports 80 and 443 are open.

6. Advanced Fixes for Persistent Error 9999

A. Use Incognito or Private Mode

This bypasses corrupted cookies and extensions.

B. Create a New Browser Profile

Corrupted profiles can cause persistent script errors.

C. Report the Issue to Intuit

• Click Report Issue on the error message

• Submit your contact information

Intuit may need to refresh your bank feed token.

7. Common Scenarios and Solutions

Error 9999 When Updating Bank Feeds

Clear cache and reconnect the bank account.

Error 9999 Only on One Browser

Switch browsers or reset browser settings.

Error 9999 After Bank Password Change

Reconnect the bank account with updated credentials.

Error 9999 After Windows Update

Disable script blockers and clear browser cache.

8. Prevent QuickBooks Error 9999

• Keep your browser updated

• Clear cache regularly

• Maintain stable internet connection

• Avoid aggressive antivirus settings

• Reconnect bank accounts after password changes

• Use supported browsers for QuickBooks Online

Conclusion

QuickBooks Error 9999 is typically caused by script errors, corrupted browser cache, bank connection issues, or security restrictions. By clearing cache, reconnecting your bank account, adjusting browser settings, and fixing security blocks, you can restore bank feed functionality quickly.

For professional QuickBooks Error 9999 troubleshooting and bank feed repair assistance, call +1‑866‑408‑0444 today.