Lots of small business owners will overpay this year, because the first familiar B&O Small Business Credit page has the old credits. The new better credits are on the 2nd and 3rd pages, Table 2.
Here's the deal. If 50% or more of your taxable B & O Income is reported under Service, and your B & O tax is anything up to $841, you get a credit for ALL OF IT. It steps up from there to $1681.
Look for it. You deserve a (tax) break today.