Tolerance dimensions can only be added in sketch view. It would be great if any feature or sheet metal flange could have a tolerance. The tolernace calculator in Inventor is so basic that it is hardly used. The best would be that you select features in the model and let Inventor calculate tolerances in stack ups or parts . Then even better, let Inventor calculate the tolerance for typical yields in production using the tradition satistical methods.
Some of these features are common on quite a few other 3D CAD programs.
VOTE for these features to be added to a better Inventor product which will save time and money.
Thanks