The 8453 is not necessary. If all the transactions are covered, you can simply input two lines - on ST with totals and on LT with totals. I use sale date of -010121 and purchase date of -010100 for LT and -010121 for ST. 

If you need to do more you can attach a pdf to e-file.

https://proconnect.intuit.com/community/form-8949/help/individual-form-8949-exception-2-to-reporting...