You should be able to find the vouchers with your print out:
Please log back in your TurboTax account and "add a state" to open the return back up (you are not really adding a state, just to open it back up), then select Tools on the left, Print Center and choose the print center, then select returns and choose to print just the tax return or to include all worksheets as well.
Please see these FAQs for additional information:
https://ttlc.intuit.com/replies/3301385
https://ttlc.intuit.com/replies/3302458