Turbo tax says to file form 8453 with 1099-B documents But form 8453 specifically lists which forms can be sent with it and 1099-B is not one of them. ..What gives?

Its the last option for Form 8949 - the 1099B is the statement with the same information.

Form 8949, Sales and Other Dispositions of Capital Assets (or a statement with the same information), if you elect not to report your transactions electronically on Form 8949