windows computer
without a printer how do you plan to mail the PDFs. also 10/15 the deadline is always a good time to ask questions that may not be immediate solvable. you could go back into Turbotax and try this click print on the file tab; preview print copy; a new windows opens. click on file then print. select MS PDF or MS XPS as the printer (you need to have the xps option in windows activated). then save and see if readable. if so you still run into the issue of no printer. if corrupt contact support
5am-5pm Pacific Time (8-8 Eastern) Monday - Friday
https://support.turbotax.intuit.com/contact
800-446-8848
