capital loss carryover

dear community,

 

i had a capital loss from about 8 years ago, which i have never claimed on any of my tax returns, but I wanted to start claiming it this year. i read that, if i am married, filing jointly, i can claim up 3,000 dollars per year for capital losses. just wanted to please ask a few questions. 

 

since the loss occurred 8 years ago, is there an expiration date of when i can actually claim this loss. or if i have not yet ever claimed it on any of my tax returns from prior years, then i can still claim it whenever i want? no time limit essentially?

 

also, i was trying to do it in the online platform, premium version, i clicked on capital loss carryover, but after that for some reason im not able to figure out where i can actually enter the amount that i would like to claim as a carryover.

 

thank you so much for your help, time, and attention