https://ttlc.intuit.com/community/taxes/discussion/re-forgot-1099-b/01/20819#M9401 <P>Yes, you are correct that there will be no change if you already had prior $3,000 carryover losses. But you must file to show the $60,000 loss and the carryover losses. Also, the IRS has a copy of the 1099-B and will be looking for the gross proceeds and basis from it on your tax return.&nbsp;&nbsp;</P> Thu, 28 Mar 2019 15:10:07 GMT MargaretL 2019-03-28T15:10:07Z https://ttlc.intuit.com/community/taxes/discussion/forgot-1099-b/01/20777#M9400 <P>&nbsp; I forgot to file&nbsp; a 1099-B in my tax return( loss over $60,000)</P><P>I suppose I should fill out a 1040X&nbsp;</P><P>In filling out 1040X, everything in column A will be the same in column C ?</P><P>Not getting any additional tax refund( already carried forward $3000 from previous tax losses.)</P> Thu, 28 Mar 2019 01:17:37 GMT https://ttlc.intuit.com/community/taxes/discussion/forgot-1099-b/01/20777#M9400 stantonporsche 2019-03-28T01:17:37Z https://ttlc.intuit.com/community/taxes/discussion/re-forgot-1099-b/01/20819#M9401 <P>Yes, you are correct that there will be no change if you already had prior $3,000 carryover losses. But you must file to show the $60,000 loss and the carryover losses. Also, the IRS has a copy of the 1099-B and will be looking for the gross proceeds and basis from it on your tax return.&nbsp;&nbsp;</P> Thu, 28 Mar 2019 15:10:07 GMT https://ttlc.intuit.com/community/taxes/discussion/re-forgot-1099-b/01/20819#M9401 MargaretL 2019-03-28T15:10:07Z