Before you close out of QuickBooks, close all open windows, especially reports. QuickBooks will open quicker next time as it will not have to recalculate the reports again. A quick way to close all open windows is to go to the 'Window' tab on the top bar - and choose 'Close All'
When you have more than one window open, instead of closing each individual window, go to the Window tab at the top of your screen, click on it and then choose "Close All". This will close all the open windows at once.
Before running your current GST 101 and detail report make sure you run your tax code exception report which will highlight any transactions you may have not put a GST code on.
Do your lists contain too many names identifying the same entity? The following procedure will walk you through merging two vendors All the historical transactions that contained the predecessor name will be modified to contain the survivors name. This procedure can also be used for items,
customers, and accounts.
Double-click on the memorized transaction as if to write a cheque (or bill or invoice, etc). Make the correction, then re-memorize (control + M) (select replace the previous transaction). Cancel the open transaction by clicking on the close window button (x).
Do not pay your payroll liabilities from the "Write Cheques" window. If you use this window, QuickBooks will warn you to use the "Pay Liabilities" window, but will let you write the cheque.