Retirement tax questions

Thank you. 

I mistakenly put the 1099-Rs on the 2019 tax return.  I will amend 2018 but I did read that it must match exactly the one filed. Unfortunately  I only have a print out of 2018 and cannot locate the TT file for 2018 return that was submitted.  Can I file this manually by printing out blank 1040X forms and finding the correct instructions?