You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

aa-taxsystem
0.5.0.3

This version was deleted from PyPI around 2025-02-15. Installing fails with:
$ pip3 install aa-taxsystem==0.5.0.3 ERROR: Could not find a version that satisfies the requirement aa-taxsystem==0.5.0.3
View other deleted versions of aa-taxsystem

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-02-14/ \ aa-taxsystem==0.5.0.3
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
aa_taxsystem-0.5.0.3-py3-none-any.whl (186.0KB)
aa_taxsystem-0.5.0.3.tar.gz (134.6KB)