De or het tiendheffing?

The correct Dutch article is:

de tiendheffing

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

How to use tiendheffing

the tiendheffingde tiendheffing
this tiendheffingdeze tiendheffing
that tiendheffingdie tiendheffing
our tiendheffingonze tiendheffing
your tiendheffingjouw tiendheffing
every tiendheffingelke tiendheffing
which tiendheffing?welke tiendheffing?
a big tiendheffing / the big tiendheffingeen grote tiendheffing, de grote tiendheffing