a "return" is not a "gain." say you give me $100 to buy something [as your agent, let's leave out my fee]. i sell it for $150, which i give to you. then $100 is a return of capital, a return of what you gave me at the start. $50 is a capital gain, i.e. it is income. you have the benefit that long-term capital gains [i assume it's long term] are taxed at a lower rate than ordinary income.

if you got 90k of taxable income, celebrate. [some of that might be recapture of depreciation deductions in prior years, but you got the benefit of that depreciation lowering your taxable income in those earlier years]