Depreciation spreads out the $50,095 over 3 years (actually 4 tax years, but the first and last year are partial years). The default method that TurboTax uses gives a bigger deduction in the early years.
If you want to use a larger than usual deduction in the first year, Section 179 or the Special Depreciation Allowance can do that (both of those ONLY apply to the FIRST year). So in your case, you said you wanted to use an 'extra' $8000 this year. Then the remaining $42,095 is spread out as usual (including some this year).
As you said, you might want to spread it out, in which case you would say NO to Section 179 and elect OUT of the Special Depreciation Allowance.
This is often a situation where you can manipulate depreciation for a good tax outcome. But that can be complicated to figure out how to do that, so going to a good tax professional may be a good idea.
