Thank you for posting this question, you can do this by filing an amendment. However, the IRS may deny you claim for this credit. The IRS States on their website "Generally, for a credit or refund, you must file Form 1040-X within 3 years (including extensions) after the date you filed your original return or within 2 years after the date you paid the tax, whichever is later." Either way amending now is worth a try. This will allow you losses to be carried forward. https://www.irs.gov/instructions/i1040x
