Hi’ any help or suggestions?

We are selling our US holiday home after 6 years and want to bring back the furniture to use in our home in Ireland. 

All the info I find is based on changing residence which technically we are not. We have had our main home in Ireland all along. Will we be subject to duty and taxes?

Also about 90% of the furniture was originally purchased in and shipped from Ireland to the USA 7 years ago because we thought we were moving permanently to the US. That plan  changed and we returned to Ireland after 6 months but chose to not sell the house we purchased 6 years ago until now. 

Is there any provisions for this type of scenario?