It depends on the financial institution or bank being connected to and can range from few months to up to a year or so. We have little control over this and rely on our cloud/bank feeds partners (like Yodlee) and the level of the integration they offer with the institution. Most bank and credit card institutions allow you to import transactions up to the last 3 months (90 days), although in some cases it can be up to 6 months. Check the Core Help for details.
Please call BQE Support for any assistance.