Business & farm

If I read it correctly, Form 8453 says to only attach 8949s if you elected not to report your transactions electronically on 8949. Therefore, if you already e-filed them can you just mail in the Section 751 statement with all the info you stated in your first two paragraphs without Forms 8453&8949? If yes, where do you mail the statement? Is it mailed to your regional IRS office? I couldn't find any info on the Texas branch you provided. If I did not understand it correctly, can you please explain.  Thanks.