Can I refile electronically again and how? I e-filed my tax return for 2018 through TurboTax and have ID no etc. But IRS wrote that they have not received it.

e-filing for 2018 is closed. you must mail in the return. be sure to follow TT filing instructions.  mail using a method where you get proof of delivery. 

Not sure when you e-filed your 2018 return---or when you think you e-filed it.  E-filing has been permanently closed for 2018 returns since October of 2019.  After that, the only way to file a 2018 return has been to print, sign and mail it in.  If you tried to e-file it before the deadline last year, maybe it was rejected and you did not notice.  If so, you can still file it but it has to be mailed.

Were you supposed to get a refund or do you owe tax due?  Post back with more information on what you did to file 2018 so we know how to help you.