Here's the translation, with a little nuance added for clarity: "I guess my income went up last year because of my salary and stock options... The fee is $300, which feels high compared to what I've paid in the past. (Even though I did switch accountants this time...) Is that a reasonable amount?"
Depending on the type of document, I don't think that price is too expensive. What hasn't gone up in price these days? If you think it's too expensive, you could use TurboTax.