Sole Proprietor In Software

I noticed this today:
http://www.revenue.state.il.us/Businesses/TaxInformation/Income/subchapters.htm
Illinois charges most corporations a 1.5% “replacement” tax.  Seeing as I will be taxed as an s-corporation I will have to pay that.  ugh.  Another $1000 or so for me eventually.  Even if I stayed taxed as an LLC (technically “partnership”), they still charge the tax.  They do say “Partnerships, trusts, and S corporations pay [...]