Custom GPT builder — finish and tune an overseas tax assistant gpt

I run an overseas tax advisory business for Australians. I've built a custom GPT that acts as a free diagnostic/advisor. It's about 80% there. The conversation works well but not at the standard I want it at. I'm not a developer. I want someone I can talk to plainly about what's working and what isn't, who'll test properly and tell me when an idea of mine is wrong. Currently the gpt conversation reads as templated — every response has the same shape and repeats the same points, so it doesn't flow like a real exchange. And the final report has a section that calculates figures and charts which only works about half the time; when it fails it writes a paragraph telling the user why. Would love to find someone to build this with me as a collaborative effort. What's built - A full instruction set - Four knowledge files: flag library, teaching notes, report format, and a savings/destinations model - Roughly 20 test runs against a competitor's equivalent tool Here is a link to the current version of the gpt: https://chatgpt.com/g/g-6a6eaa0b1f6081919e9b3c5fd2362e8f-aus-overseas-tax-ai-assistant And here is a link to another gpt that I want it to be closer too; https://chatgpt.com/g/g-682bd26f75108191a969b3fa0745d36a-global-tax-strategy-ai-assistant