This isn't a software change. It is the change in the way the tax code was written. It doesn't take coding to fix it, it takes a change in calculation. This is their primary job, to handle taxes. Stop making excuses for them. If I can do the math in my head in 5 minutes, they can make an update to the way it is calculated in their software in 2 weeks.
FYI, there was another change put out by the IRS yesterday which now allows you to exclude UI income from your AGI in order to qualify for the tax exemption. I hope this doesn't take them another 2-3 weeks to figure it out. This is a big deal if your AGI is near the $150k limit but you are over it.
https://cnb.cx/3rollnH
