Before applying the following methods to resolve QuickBooks Banking Error 9999, don’t forget to update your accounting software. And then, try to attempt the below-mentioned solutions to get rid of the error 9999 one after another.
Method 1: Create a backup of the Windows Registry Entry
Firstly, write “command” and choose Start.
After that, press and hold the Ctrl + Shift simultaneously.
Then, click on Yes in the dialogue box.
You are required to write Regedit and press Enter.
You need to look for backup followed by choosing the key related to QuickBooks Online Error 9999.
Give a new name to the backup file under the file name box.
After that, you need to choose the branch and save the file as a .reg file.
Finally, the backup of the window registry has been created.
Method 2: Disconnect the QB Bank Account
Firstly, choose the pencil icon and choose the account that has been failed to update.
After that, choose “edit account info option”.
Next, you are required to click on Disconnect this account.
Choose Save and then click on Close.
Search for the Dashboard.
Now, you are required to choose Reestablish after disconnecting the account.
Next, choose Add Account and link your QuickBooks Online account.
Enter your username and password to run the bank account.
Finally, once the link gets established, you will start getting the transactions from the bank account.