What is Connection error (400) and how is it fixed?

Hello, @sevenwithfaith.

Most of the time, error 400 means that the server is unable to process the request being sent due to an issue that is perceived by the server (corrupted). If you're trying to connect your bank, we can perform some steps to isolate the problem. First, log in to your bank's website to check if you're getting the same error. If the issue persists, the error may be coming from your bank. You may reach out to them to investigate this further.

On the other hand, you can try manually updating your bank account to refresh the connection between QuickBooks and your financial institution.

Here's how:

1. Go to the Banking tab.
2. Select the blue tile at the top for the bank account you want to update.
3. Click the Update button. If you see a message about additional authentication, follow the on-screen instructions. Not all banks require this, but some do for added peace of mind.

I'm also adding this article for your reference about fixing banking errors in QuickBooks Online.

If there's anything else you need help with, let me know by adding a comment. I'm always here for you. Have a good day!

There has to be some better answer that just hitting the update button, until it works!

I can see here how it is important to fix the correction error (400), @tgeorge. Let me add some details to help you with this. 

As mentioned above, you'll need first to check your bank's website. It could be that the error is coming from your bank. 

Otherwise, you can manually update your bank to restore the connection. You can follow the steps given by my colleague above. 

However, if the issue persists after doing the troubleshooting steps, I encourage you to contact our support team. They have the tools to further check your account. 

Here's how: 

1. Sign in to your QuickBooks Online company.
2. Click the Help (?) icon at the top right.
3. Enter your concern, then choose Let's talk.
4. Click Contact Us to connect with a live support agent.
5. Select Start a chat with a support expert or Get a callback from the next available expert.

For more information on our product services and support hours, please view this article: Contact QuickBooks products and services Support.

Additionally, I'll be adding these resources that can be handy in the future: 

• Fix banking errors
• Set up any banking rules

Feel at ease to comment down below if you have other banking concerns with QuickBooks. I'll be happy to help you more. Stay safe always.

Getting this error when adding a new employee's w-4 info

I know the importance of completing your new employee's W-4 information in QuickBooks Online (QBO), @ehwison. That's why I'm here to guide you on the actions you can take to fix the error and keep your payroll account updated.

There are times that the browser is full of frequently accessed pages, thus causing some unusual responses to the system. Let's boosts the background process of your browser and isolate the error by performing some troubleshooting steps.

You can start by pulling up your QuickBooks Online (QBO) account using a private browser (incognito). Here's how:

• Press Ctrl + Shift + N (Google Chrome)
• Ctrl + Shift + P (Firefox)
• Control + Option + P (Safari)

Once signed in, go to the Payroll menu's Employees tab and add the new employee's W-4 info (Please see the attached screenshot below for your reference. If you're able to do so without getting an error, return to your default browser and clear its cache. This will refresh the system and remove older data that causes viewing and performances issue. However, if this matter continues, I'd recommend using other supported browsers.

Additionally, there are new changes to the Federal W-4. If you wish to know more about this, I'd recommend checking out this article: What’s changing with the Federal W-4?. It also answers the most frequently asked questions about it and guides you on how to print one for your employee.

In the meantime, I'm also adding this article to further guide you in managing your employees and payroll account in QBO: QuickBooks Help Articles. It includes topics about editing payroll, its benefits, and subscription management, to name a few. You can click the + More topics button to view other selections.

Please keep me posted on how it goes. If you have other concerns about adding employee's W-4 information in QBO, I'm just around to help. Take care always.

I am getting this error when trying to download a clients accountant copy.  The fix you suggest does not relate to what I'm doing and when I am getting the error.  Any other suggestions?

Thank you!

Hi Lori86!

Welcome to QuickBooks Community. Allow me to help you in fixing the connection error 400.

QuickBooks Online allows you to be added as an accountant so you can review a client's data. If you encountered this error while accessing the client's file, it could be because of a browser error. You'll want to use an incognito window and review it from there. Incognito won't save your browsing history which can result in an error.

These are some of the shortcut keys:

• Google Chrome: Ctrl + Shift + N
• Safari 11 or newer: ⌘ + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P  

Also, you'll want to clear the cache and make sure you're using a supported and up-to-date browser. This can fix any browser-related issues.

If the same thing happens, you'll want to inform your client to remove you, then re-invite.

In addition, here are the articles for the detailed steps if you need a backup of your QuickBooks Online data:

• Make a copy of your QuickBooks Online Advanced company

• Back up and restore your QuickBooks Online Advanced company

Post a comment again here if you need more help with this. I'll respond as soon as I can.

I am getting this error when adding an employee.  It won't tell me what information is wrong it just says something is wrong with a yellow mark next to the employee. it keeps reverting back to the single status but she is not single, it is not correct.  It won't hold my information. Payday is Friday.  i must get this entered.  have never had this problem. have requested a call several times this afternoon.  I have spent since 1:30 pm on this and am no where.  Quickbooks used to have phone support.  now they have doubled their prices and offer no support at all.  What am I going to do?  About to have a meltdown. If they are telling me that there is something wrong, then tell me exactly what it is.  I have cleared myy cache, I have gone into an incognito window, I have done everything I can.  But someone from Quickbooks needs to help me. This is nuts.  Thank you for listening. 

Thanks for bringing this to out attention, MDB0716.

We've been alerted about the error when adding an employee. The workaround provided is to sign out and sign back in to your QuickBooks account to refresh the page.

If not, you can try adding employees via other supported browsers. You may browse again this article to learn what browser to use: System requirements for QuickBooks Online.

If the same issue persists, I recommend contacting our QuickBooks Online Live Support Team. That way, they can create a case to isolate and monitor again the issue.

To make sure that you're contacting the right support team. Please use this article: Contact Payroll Support. It has the phone number and steps on how to chat or get a callback from them.

Don't hesitate to post again if you have other QuickBooks concerns or if you have additional questions about the error. Just leave a comment below and I'll get back to you.

This appears to be a QBO answer to a desktop problem.  They were getting the error when trying to

bring in an acct. copy of QuickBooks.  I am getting the same error when I try to bring in a clients 

acct. copy.  Suggestions (in desktop format)?

Hello jljohnsoncpa!

I understand that you need to import the accountant's copy. I'm here to assist you in fixing this error.

First, let's make sure that you're using a compatible version of QuickBooks Desktop. This is a common reason why we're unable to import the file. You and your client should be using the same version or at least with one year gap but you must have the more recent version.

Example: 

• Client: Client: QuickBooks Desktop Enterprise 2021
• Accountant: QuickBooks Desktop Enterprise Accountant Edition 2021 or 2022

Second, you'll want to advise your client to run the verify and rebuild tool. This is to ensure that there's no issue on the client's file before creating an accountant's copy. That way, you can import it without errors.

Third, update your and your client's QuickBooks Desktop. This is to ensure that you have the latest patches and fixes. You can find the steps here: Update QuickBooks Desktop to the latest release.

Lastly, you can check this article: Use the Accountant's Copy. This will explain more about how to use the Accountant's Copy and accountant's changes files including file conversion and removing restrictions.

I'm more than happy to work with you again in managing your files. Want to record invoices or other sales transactions? Let me know and I'll get back to you again.

You did not respond to the question.  This has nothing to do with ON_LINE.  The error is coming when trying to download an Accountant's copy (QBKS 2024 version).  This is from the superior product.. Desktop!. So any thoughts on this error for Desktop?

Hello there, DSGcpa.

I'm here to provide some information about the connection error and guide you on how to fix it.

The Connection Error (400) you encountered while attempting to download an Accountant's copy in QuickBooks Desktop is usually caused by a problem with the network or internet connection. There are a few troubleshooting steps we can perform to fix this. 

First, ensure that you have a stable and reliable internet connection. If you are connected via Wi-Fi, try connecting with an Ethernet cable for a more stable connection.

If you are already using a wired internet connection and are still getting the error, you can temporarily disable your antivirus or firewall. These settings can sometimes cause issues with QuickBooks Desktop's connection. After you've disabled them, download the accountant's copy again. Here's an article you can use as a reference: Set up firewall and security settings for QuickBooks Desktop

Also, make sure to update QuickBooks Desktop to the latest release. This will help ensure that you have the most up-to-date software version with the latest bug fixes, security patches, and enhancements.

Let me know if you still have other concerns or any QuickBooks Desktop-related questions. I'll be here to assist. Keep safe!