Are you currently using QuickBooks software and having error H202? QuickBooks error h202 is an error that can be caused by an incorrect date format or a corrupted QuickBooks installation. The cause of this error could be an incorrect date format. To fix this problem, change the date format on your system to match the specific region you are in and restart your computer. If this does not solve the problem, try reinstalling QuickBooks. The cause of this error could also be a corrupted QuickBooks installation. To fix this problem, you can try to reinstall QuickBooks.