For one thing because software companies cannot program using the paper form, they must use IRS file specifications (schemas) that the IRS issues about 3-2 weeks after the paper form is published.
For another thing, TurboTax has about 15 different versions that must be updated and Mac and Windows updates require that each user must download and install the update which takes time and effort for each user so TurboTax schedules update about 2 weeks apart to prevent too many updates. 5/14 is a scheduled update. I suspect that the 8915A should be ready by then also so they probably want both forms updated at the same time.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
