Easy Way To Fix QuickBooks Error 3120
                     Effective Ways To 
Troubleshoot 
QuickBooks Error 3120
QuickBooks Point of Sale has simplified recording the daily transactions and setting up the 
inventory for retail store owners. Unfortunately, users sometimes face 
QuickBooks Error 3120 when transferring financial data to QB Desktop. If you also 
encounter this error during the financial exchange, go through this blog to find out the causes 
of the issue and the correct methods to get rid of it.
Rectify the error quickly with the troubleshooting directions provided by our QB 
support team at 1-855-856-0042.

Primary reasons for error code 3120 in QuickBooks
This data discrepancy error blocks the financial exchange between QB Desktop and QB 
Point of Sale. The reasons for this QB POS error to emerge on your system are mentioned 
below-
• The invoices you transfer to QB Desktop have data discrepancies with the original 
financial data stored in the software.
• Your accounts in the QB POS program aren’t mapped accurately, and there are some 
issues with the A/R or the A/P accounts.
• An outdated QB POS version can also develop this issue because of compatibility issues 
during the financial exchange.
Techniques to resolve QuickBooks Desktop error 
3120
You won’t be able to use QB POS efficiently or share data with QB desktop after this error 
develops on your system. The easy techniques to get rid of the QB POS issue are 
mentioned below-
Solution 1- Map the QB POS accounts correctly in the software
You can encounter this error due to inaccurate account mapping in your QB POS software. 
This happens if the A/R & A/P accounts do not have the correct data or multiple invoices 
haven’t been updated. This causes problems when you run a financial exchange with QB 
as the data you transfer will have discrepancies with the original bookkeeping data stored 
in QBDT. You need to check the incorrectly mapped accounts and ensure that none of the 
items turn inactive. Use the following steps-
• Launch the QB POS application on your computer and access its File menu.
• Click the Preferences option in the drop-down list and tap Company.
• Go to the Financials section and hit the Accounts option.
• Move to the Basic and Advanced tabs to ensure the POS accounts are mapped correctly.
• All the account names you see inside [ ] brackets are incorrectly mapped, and you need 
to delete or edit their details.
If the POS error appears after mapping the accounts correctly, move to the next solution.
Solution 2- Update your QB POS version to the latest release
You can also run into issues during the financial data transfer if you use an outdated QB POS 
version on your computer. You must always use the latest application version to prevent 
compatibility issues from blocking the software functions. Use these steps-
• Go to the QuickBooks website on a web browser and enter the details of your QB POS 
product.
• Find the latest update version for your QB product and begin downloading it on your 
computer.
• Install the POS update after it is downloaded and rerun the financial exchange.
Conclusion
This brings us to the end of our blog explaining why QuickBooks Error 3120 stops financial 
exchange between QB POS and QB Desktop. The methods required to counter this POS 
error are also mentioned in the blog, and we hope you use them to run the financial 
exchange without problems.
Consult our QB support team at 1-855-856-0042 if you face problems using the solutions.