Attaching documents in QuickBooks desktop shouldn’t affect the performance of the software. They are saved on the computer hard drive in a separate folder, and they are not included in a back up of the QuickBooks company file either so that backup file does not grow either. All attaching does in QuickBooks, is to enter a pointer to the hard drive location for the attachment folder.
If you experience slowness with QuickBooks, there may be other reasons like due to a large company file or network issues.
Import items into your company data file from an Excel spreadsheet
From the article: If you are importing existing inventory items, you cannot update their Quantity On Hand (QOH), value on hand (VOH) or average cost. For new inventory items you are importing, you can set up a Quantity On Hand (QOH) and a Value on Hand (VOH) and establish an average cost. QuickBooks enters an Adjust Quantity/Value on Hand debiting the item’s asset account and crediting Opening Balance Equity …
Switch between banking modes in QuickBooks Desktop
From the article: QuickBooks online banking lets you match transactions using an Express Mode (Side-by-side in QuickBooks 2013) that is more of a graphical interface, or a more classic view called Register Mode …
Error OL-332: Invalid customer ID or PIN when using online banking
From the article:You submit an online banking transaction and enter your personal identification number (PIN). The following error message displays: Invalid customer ID or PIN. Please try again. If the problem continues, please call customer service for your financial institution [OL-332] …