I have been working on the OptiTax project only in my spare time on weekends until the end of June. In early August we arrived back from our summer vacation, so I started working on the project full time.
After having some initial hurdles I put an alpha version of the MVP online. It was just enough to have a demo to my accountant. He tested it and came back with some good feedback on both the calculations made and the presentation of the input and output values.
I'm grateful for all his insights as my first customer. Having someone else than me to use the application helped me to understand what accountants and business owners expect form the solution.