If I use the Tax Computation Worksheet on Form 1040 Instructions, the tax comes out slightly different from the amount using Turbo Tax (about $33) - Why the difference?

[Ashby · Accepted solution]

This computation does not take into account income that might be taxed differently such as qualified dividends or capital gains.

This also will only give you the amount for space 11a prior to credits, withholdings, or additional tax.