California passthrough entities must make their election by June 15 by paying

(a) $1,000 or

(b) 50% of the PTE elective tax paid for the prior taxable year, whichever is GREATER.

The PTE elective tax payment cannot be combined with the entity’s other tax payments. To pay by voucher, print the FTB 3893 Voucher from FTB's website”.

To pay online https://www.ftb.ca.gov/pay/index.html