Well, QuickBooks Bank Error 109 can occur while downloading or importing bank transactions. All you need to do is to carry out the steps inclined below:

a. Firstly, sign in to your bank or credit card’s website.
b. Now, follow the instructions for your bank on how to download CSV files of your transactions to your system. Every financial institution has different steps.
c. Ensure that the date range for the download is at least one day before your oldest transaction.
d. Ultimately, download the transactions and save the file somewhere you can easily access it.