Hello, first let me disclose my firm Independence Wealth Management do not offer a US tax filing service but we do make a point of finding the right tax firm for our clients, just as we ensure the client has a shortlist of the right brokers and private banks to choose from, as regards dealing and reporting. We provide asset management.
Currently the shortlist is Kristina Searle, Anthea Taeuber, Liz Zitzow, Frank Hirth and Darlene Hart depending upon what the client needs. Kristina has a fixed fee which we think is modest and sounds about right for what you describe. If you'd like an introduction, feel free to contact me.