Can I get a tax refund this year if I made capital gains last year and paid tax on it, but made capital gains loss this year?

the only capital loss carryback available is for regulated future contracts. capital losses on stocks, bonds, options, and mutual funds cannot be carried back

A tax refund or taxes owed is based on your total income, your total tax liabilities and the total of all taxes withheld and/or credits eligible to be received.

Start a tax return to get an estimate of a tax refund or taxes owed - https://turbotax.intuit.com/personal-taxes/online/

You can also use the TurboTax calculator to get an estimate of a tax refund or taxes owed - https://turbotax.intuit.com/tax-tools/calculators/taxcaster/