Belastingadviseur gezocht voor Belastingadvies rond bezit in België en Dubbele IB-Aangifte

Toelichting op de situatie:
I would like to ask for an offer for my partner and I. We are in an interesting situation. My partner is from Belgium and I'm from Hungary.
We are not married nor have a samenlevingscontract. We live together but we don't own a house, we rent a house. We only own a car.

On the other hand my partner has a property on his name in Belgium, this property is inherited by his mother and for taxation reasons it was signed on his name, although by law he doesn't receive any benefits from having this property assigned to him.

My partner was doing his belastingaangifte in Belgium until 2011, we believe he paid too much taxes and might have made some mistakes when submitting his taxes, because at a certain point he received a letter from belastingdients in NL that he could receive 700 euros back, while he had to pay more than 700 in Belgium, strange. .... I'm not sure i have to check whether he did any aangifte in 2012, but surely didn't submit his taxes in 2013.

The last time I did my taxation was in 2008, I think. I didn't do much except working for the same company since then.
Our son was born here in the Netherlands in 2012.
He goes to the kinderopvang since 2013 (we were eligible to receive kinderopvangtoeslag).

Hulpvraag:
I would like to receive an offer for the following items:
- review my partners previous Belgian taxation and ask tax authorities to review his case;
- advise on what would happen if we need to submit our taxes here in the Netherlands, concerning his property on his name in Belgium;
- do his aangifte for 2012 and 2013 (if it is possible to do in the Netherlands- by the way he is not a Belgian resident any more, his official address is here in the Netherlands)
- advise and help with aangifte for me 2012 and 2013 as we are toeslag partners, i don't whether that makes any difference.

I'm looking forward to hear from you, it is really time for us to sort things out.

Deadline: Zo spoedig mogelijk