Portugal Taxes

I need a accountant/tax person to assist me prepare EU resident tax papers.  I have an Ireland Passport and prepare taxes in the USA.   A person advised me I need to register with the Portugal Tax Authority to claim tax free documents for here and the USA.   Can anyone recommend a person with reasonable rates?   I do not need a Charter Accountant for this work.   Thank you.

Good question Dan
it would be interesting to how much professionals do charge for such type of services