difference between net factor income from abroad and net factor to abroad?
 

Net factor income from abroad is the excess of the amount received from foreign nations in return of goods & services provided to them over the amount paid to foreign nations for goods & services availed from them.

On the other hand, Net factor income to abroad is the excess of the amount paid to foreign nations in return of goods & services availed from them​ over the amount received from foreign nations for goods & services provided to them.

In short, 

Net factor income from abroad = factor income from abroad - factor income to abroad
                                                  Or
Net factor income from abroad =    -(Net factor income to abroad)