The $10,200 unemployment retroactive to 2020 was just signed into law. Now the IRS is responsible for writing regulations and rules for claiming it.
Software changes do not happen overnight - it takes time to test, package as an update and fit into the existing update schedule. Probably a few weeks.
It also must be submitted to the IRS for approval before it can be released.
https://www.irs.gov/faqs/irs-procedures/forms-publications/new-exclusion-of-up-to-10200-of-unemploym...
**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.**
