Can a capital gain from investment property sale be used on my primary home mortgage to avoid the capital gains tax from sale and how would that be reported in turbo tax?

[Anonymous_]

No. 

However, you may be able to do a 1031 exchange if you replaced your investment real estate with other investment real estate.

See https://turbotax.intuit.com/tax-tips/investments-and-taxes/1031-exchange-how-it-works/c998pvsTp

[Mike9241]

if you already received the proceeds from the investment property sale it's too late to do a 131 exchange