De or het taxionderneming?

The correct Dutch article is:

de taxionderneming

Rule Words ending in -ing: almost always de. See the rule

How to use taxionderneming

the taxiondernemingde taxionderneming
this taxiondernemingdeze taxionderneming
that taxiondernemingdie taxionderneming
our taxiondernemingonze taxionderneming
your taxiondernemingjouw taxionderneming
every taxiondernemingelke taxionderneming
which taxionderneming?welke taxionderneming?
a big taxionderneming / the big taxiondernemingeen grote taxionderneming, de grote taxionderneming