more here - looks like with Online you can attach is as PDF instead of mailing
https://ttlc.intuit.com/turbotax-support/en-us/help-article/form-1099-b/need-include-1099-b-return/L...
you may also want to see if HR Block has the import working for your broker. Keep in mind there are limits on these imports (Turbotax has 10,000 transaction limit) and a 570 page 1099B is pretty extreme.
