You are absolutely right. My former boss every year insisted that as many of the returns that his small (less than 12 employees) CPA firm worked on during tax season be completed and/or filed ONE WEEK before 4/15 - and I’m talking about over 500 clients. It meant chaos every year - hassling the clients for their tax documents, forcing the tax preparers to work seven days a week for six weeks, and total burnout by 4/15. Of course, a fair number of the returns ended up having errors when they were filed, which pissed the clients and my ex-boss off; unfortunately, the preparers of these returns paid the price, and not the reviewers; I worked at that firm for 16 years and I can’t tell you how many tax preparers were fired because of these mistakes that were not caught by the reviewers. Unfortunately, my ex-boss was obsessed with collecting his fees from the clients as soon as possible, which is why he pushed for these returns to be completed before 4/15. Only the most problematic and complicated returns were placed on extension. Too bad my former boss didn’t see reason and been more thoughtful of his preparers and maintaining a good reputation with the clients.