I recently wrote an article on this subject with the information quoted directly from Intuits Quarterly reports:
In 2016 Intuit Sold about 956,000 copies of QuickBooks Desktop, and another 326,000 subscriptions to QuickBooks Desktop. Fast Forward to 2018 and QuickBooks Desktop subscriptions increased to 385,000 plus an additional 749,000 QuickBooks Desktop Units Sold. Collectively the total desktop ecosystem revenue is projected to crest slightly over 1.8 billion dollars compared to the online ecosystem that is expected slightly under 1.2 billion in revenues.
There is no doubt that Online is growing very quickly, but desktop is still making them a lot of money.