depending on what you used to back sweeten, you may need to add potassium sorbate (unless you had filtered with a 1 micron or less filter to get rid of all the yeast). If you used a wine conditioner, it will already have some in it, but it's dependant on how much you used.
If you just added sugar, you'll want to add sorbate to prevent fermentation from starting up again, and making corks pop out, or getting sparkling wine.
Also before bottling you'll want to make sure your sulfite levels are high enough to prevent spoilage. If you have a tester, you'll want to have the SO2 levels between 30-50ppm.