Amending a 2019 form 1040 that has already been filed.
A few months after client's form 1040 (and CA form 540) were filed, he received an unexpected K-1 from a Liquidation Trust. Should I redo the client's 2019 return completely, or is there a way to amend the existing file and re-submit it? Have never encountered this problem before. Thanks for any assistance.
