Go to Forms Mode. At the top of the left pane, click on the red octagon button. TT will open a small box in the lower right pane with a short description of the error and will bring up the form and location and will highlight the cell in red or blue. Make the correction to clear the error and if necessary click on the down arrow to locate the next error. When the errors are removed, click again on the red octagon button to close the lower box.