Why does my Mac version of TurboTax 2018 take so long in the Extracting update phase of the software update process?

I am running the latest version of macOS Mojave, 10.14.3. When I start TurboTax 2018, it often says that it has to install an update to the program. Updating takes upwards to 20 mins--I haven't actually timed it, but it's takes a long, long time. Most of that time is spent in "Extracting update...".

It takes much longer to update than a typical Mac program. Can this be fixed?