I started out with a $1400 refund, I loaded up gambling win of $6000 and a gambling loss of $6000 and ended up with only a $350 refund

[Opus 17 · Accepted solution]

Gambling losses are an itemized deduction.  To benefit, your total itemized deductions (state income tax, charity contributions, mortgage interest and property taxes) must be more than the standard deduction.  It sounds like you were claiming the standard deduction before (and maybe still are) and so aren't getting the full benefit of the deduction.

[mandyalanna]

Should I claim the standard deduction?

[Opus 17]

Let Turbotax claim whatever is best for your situation.  If you have gambling losses, you can't deduct them at all using the standard deduction.  You may be able to deduct them if you itemize, depending on your other tax facts.