Explain how any gain on this asset will impact the tax obligation for Mr. Mann as the proprietor.

Any gain that Mr. Mann makes from the sale of his asset will impact his tax obligation according to the capital gains tax rate. Capital gains are defined as taxable profits generated from the sale of an asset, such as stocks, real estate or other investments. The Internal Revenue Service (IRS) taxes these gains at different rates depending on how long the asset has been held for and what type it is; short-term capital gains are taxed as ordinary income at individual’s marginal rate while long-term capital gains are typically taxed at lower rates in order to incentivize long-term investments.

As a proprietor, Mr. Mann would be subject to self employment taxes which generally apply to individuals who operate their own business or trade with substantial amounts of money. Depending on his particular business structure and filing status, he may incur additional taxes when claiming any profits generated through this activity; in general however – he should expect to pay between 10% and 20% on any net profits made within a year due to capital gains exposure.

In summary, if Mr. Mann realizes any gain from selling an asset then it will increase his total tax burden since he will have to pay both personal income taxes as well as self employment taxes related to this activity – unless special exemptions or rules apply in certain cases due to passive loss limitations or other exceptions outlined by the IRS code.