Using TurboTax Business, I filed my 2018 taxes for LLC. A 2019 LLC tax voucher printed out. Is this correct? Voucher is for 01-01-2019 to 12-31-19. How do I pay for 2018?

After filing my 2018 taxes for multi-member LLC, with zero income and zero expenses, the next step was to print the voucher to pay my LLC taxes. However, my LLC started 5-1-2018. The voucher is for 1-1-2019 to 12-31-19, and also says Taxable year 2019 for $800 dues. Do I need to pay for 2018? How? Can I go to feb.ca.gov to pay electronically with WebPay? If so, do I adjust the information to reflect 2018 taxable year, so I would input 5-1-2018 (the date I started the business) to 12-31-2018? Also, would I still need to pay this taxable year 2019 $800 voucher today as well?