Capital Loss Carry Forward

Example situation using Turbo Tax 2017 Desktop for single head of household; 

2017 reported $18,329 net loss, claimed $3,000 for 2017 tax return with a Short-term capital loss carryforward to 2018 of $15,329;

 

2018 Had no income, didn't file a return (forgot I had a carry-forward loss from 2017);

 

2019 Had no income, filed a TurboTax free online return for receipt of a $5 donation, for purposes of establishing COVID Relief Check (forgot I had a carry-forward loss from 2017);

 

2020 Filed a TurboTax free online return with $21,000 gross with standard deduction, net taxable income of $8648, $863 fed taxes due, 1,385 fed taxes withheld = $522 refund rec'd (forgot I had a carry-forward loss from 2017).

 

QUESTION #1: Do I need to go back and file 2018 even though there is no income, for purposes of carrying forward the 2017 Capital Loss of $15,329? Can I do this with online TurboTax online? 

 

QUESTION #2: Do I need to go back and file Amended 2019 via TurboTax online even though there is no income, for purposes of carrying forward the 2017 Capital Loss of $15,329?

 

QUESTION #3: If the answer to #1 and #2 are yes, am I able to Amend 2020 TurboTax online even though I have already rec'd a $522 refund, for purposes of claiming any part of the 2017 Capital Loss Carryforward of $15,329 that was supposed to be carried from 2017 to 2018?   If yes, will the TurboTax 2020 online program which I used be able to automatically import the 2017 TurboTax desktop return-worksheet to automatically calculate the Capital Loss Carryforward ?

 

Thank you!