I have seen all the questions for this question, and I try all the answer like copy paste, csv (in fact this I don't know where to find) but none of all is not the right answer.
Can anyone help me?
Right click on the layer in the Table of Contents (aka. legend or layer tree) and open the
Save As... dialog.
Once there, click on the
Format option list and choose
MS Office Open XML spreadsheet [XLSX].
Note that you also have an option for Libre Office files:
Open Document spreadsheet [ODS].
I'm using QGIS v.2.14.4
PREVIOUS ANSWER (still valid):
Install the XY Tools plugin by Richard Duivenvoorde.
Select a vector file from the ToC (that is, make it active).
Vector->XY tools->Save attribute table as Excel file.
You would need the Python library xlw installed for doing so.
Export the layer as a shapefile, find the shapefile on your PC. Copy/Rename the filename of the DBF part of the shapefile exportes to be 8 or under characters if it's not. (OLD MS DOS FILENAME ISSUE). Then, drag-drop the DBF right into Excel.
Save as XLS.
The copy paste method right form QGIS made text/character returns in a blob reset to the next row and cause data problems in excel.