Texas does not tax personal income. It does tax a lot of other things, and the calendar is not optional. Franchise (margin) tax, sales and use tax, property, and employment still have filing dates, thresholds, and notices.
The franchise tax no-tax-due threshold and the EZ computation change. If you crossed a line last year, you do not get to file like you did the year before. We calendar it with the federal return so it is not a May surprise.
Sales tax is where growing firms get hurt: a service that was not taxable until it was bundled, a marketplace, a one-off in another state. We would rather add a SKU to the sales-tax map in the month it starts than reconstruct it in an audit.
Property and employment are local and easy to ignore until a statement or a TWC notice arrives. None of this requires a 40-page memo. It requires a list, an owner who will answer two questions, and books that already know the story.